gt:         ArrayList<ItemStack> ret = new ArrayList<ItemStack>();
context: package net.minecraft.block;
  
  import cpw.mods.fml.relauncher.Side;
  import cpw.mods.fml.relauncher.SideOnly;
  
  import java.util.ArrayList;
  import java.util.Random;
  import net.minecraft.block.material.Material;
  import net.minecraft.creativetab.CreativeTabs;
  import net.minecraft.entity.EntityLiving;
  import net.minecraft.entity.player.EntityPlayer;
  import net.minecraft.item.Item;
  import net.minecraft.item.ItemStack;
  import net.minecraft.stats.StatList;
  import net.minecraft.util.AxisAlignedBB;
  import net.minecraft.util.Direction;
  import net.minecraft.world.IBlockAccess;
  import net.minecraft.world.World;
  
  import net.minecraftforge.common.IShearable;
  import org.bukkit.craftbukkit.event.CraftEventFactory; // CraftBukkit
  
  public class BlockVine extends Block implements IShearable
  {
      public BlockVine(int par1)
      {
          super(par1, Material.vine);
          this.setTickRandomly(true);
          this.setCreativeTab(CreativeTabs.tabDecorations);
      }
  
      /**
       * Sets the block's bounds for rendering it as an item
       */
      public void setBlockBoundsForItemRender()
      {
          this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
      }
  
      /**
       * The type of render function that is called for this block
       */
      public int getRenderType()
      {
          return 20;
      }
  
      /**
       * Is this block (a) opaque and (b) a full 1m cube?  This determines whether or not to render the shared face of two
       * adjacent blocks and also whether the player can attach torches, redstone wire, etc to this block.
       */
      public boolean isOpaqueCube()
      {
          return false;
      }
  
      /**
       * If this block doesn't render as an ordinary block it will return False (examples: signs, buttons, stairs, etc)
       */
      public boolean renderAsNormalBlock()
      {
          return false;
      }
  
      /**
       * Updates the blocks bounds based on its current state. Args: world, x, y, z
       */
      public void setBlockBoundsBasedOnState(IBlockAccess par1IBlockAccess, int par2, int par3, int par4)
      {
          int l = par1IBlockAccess.getBlockMetadata(par2, par3, par4);
          float f = 1.0F;
          float f1 = 1.0F;
          float f2 = 1.0F;
          float f3 = 0.0F;
          float f4 = 0.0F;
          float f5 = 0.0F;
          boolean flag = l > 0;
  
          if ((l & 2) != 0)
          {
              f3 = Math.max(f3, 0.0625F);
              f = 0.0F;
              f1 = 0.0F;
              f4 = 1.0F;
              f2 = 0.0F;
              f5 = 1.0F;
              flag = true;
          }
  
          if ((l & 8) != 0)
          {
              f = Math.min(f, 0.9375F);
              f3 = 1.0F;
              f1 = 0.0F;
              f4 = 1.0F;
              f2 = 0.0F;
              f5 = 1.0F;
              flag = true;
          }
  
          if ((l & 4) != 0)
          {
              f5 = Math.max(f5, 0.0625F);
              f2 = 0.0F;
              f = 0.0F;
              f3 = 1.0F;
              f1 = 0.0F;
              f4 = 1.0F;
              flag = true;
          }
  
          if ((l & 1) != 0)
          {
              f2 = Math.min(f2, 0.9375F);
              f5 = 1.0F;
              f = 0.0F;
              f3 = 1.0F;
              f1 = 0.0F;
              f4 = 1.0F;
              flag = true;
          }
  
          if (!flag && this.canBePlacedOn(par1IBlockAccess.getBlockId(par2, par3 + 1, par4)))
          {
              f1 = Math.min(f1, 0.9375F);
              f4 = 1.0F;
              f = 0.0F;
              f3 = 1.0F;
              f2 = 0.0F;
              f5 = 1.0F;
          }
  
          this.setBlockBounds(f, f1, f2, f3, f4, f5);
      }
  
      /**
       * Returns a bounding box from the pool of bounding boxes (this means this box can change after the pool has been
       * cleared to be reused)
       */
      public AxisAlignedBB getCollisionBoundingBoxFromPool(World par1World, int par2, int par3, int par4)
      {
          return null;
      }
  
      /**
       * checks to see if you can place this block can be placed on that side of a block: BlockLever overrides
       */
      public boolean canPlaceBlockOnSide(World par1World, int par2, int par3, int par4, int par5)
      {
          switch (par5)
          {
              case 1:
                  return this.canBePlacedOn(par1World.getBlockId(par2, par3 + 1, par4));
              case 2:
                  return this.canBePlacedOn(par1World.getBlockId(par2, par3, par4 + 1));
              case 3:
                  return this.canBePlacedOn(par1World.getBlockId(par2, par3, par4 - 1));
              case 4:
                  return this.canBePlacedOn(par1World.getBlockId(par2 + 1, par3, par4));
              case 5:
                  return this.canBePlacedOn(par1World.getBlockId(par2 - 1, par3, par4));
              default:
                  return false;
          }
      }
  
      /**
       * returns true if a vine can be placed on that block (checks for render as normal block and if it is solid)
       */
      private boolean canBePlacedOn(int par1)
      {
          if (par1 == 0)
          {
              return false;
          }
          else
          {
              Block block = Block.blocksList[par1];
              return block.renderAsNormalBlock() && block.blockMaterial.blocksMovement();
          }
      }
  
      /**
       * Returns if the vine can stay in the world. It also changes the metadata according to neighboring blocks.
       */
      private boolean canVineStay(World par1World, int par2, int par3, int par4)
      {
          int l = par1World.getBlockMetadata(par2, par3, par4);
          int i1 = l;
  
          if (l > 0)
          {
              for (int j1 = 0; j1 <= 3; ++j1)
              {
                  int k1 = 1 << j1;
  
                  if ((l & k1) != 0 && !this.canBePlacedOn(par1World.getBlockId(par2 + Direction.offsetX[j1], par3, par4 + Direction.offsetZ[j1])) && (par1World.getBlockId(par2, par3 + 1, par4) != this.blockID || (par1World.getBlockMetadata(par2, par3 + 1, par4) & k1) == 0))
                  {
                      i1 &= ~k1;
                  }
              }
          }
  
          if (i1 == 0 && !this.canBePlacedOn(par1World.getBlockId(par2, par3 + 1, par4)))
          {
              return false;
          }
          else
          {
              if (i1 != l)
              {
                  par1World.setBlockMetadataWithNotify(par2, par3, par4, i1, 2);
              }
  
              return true;
          }
      }
  
      /**
       * Lets the block know when one of its neighbor changes. Doesn't know which neighbor changed (coordinates passed are
       * their own) Args: x, y, z, neighbor blockID
       */
      public void onNeighborBlockChange(World par1World, int par2, int par3, int par4, int par5)
      {
          if (!par1World.isRemote && !this.canVineStay(par1World, par2, par3, par4))
          {
              this.dropBlockAsItem(par1World, par2, par3, par4, par1World.getBlockMetadata(par2, par3, par4), 0);
              par1World.setBlockToAir(par2, par3, par4);
          }
      }
  
      /**
       * Ticks the block if it's been scheduled
       */
      public void updateTick(World par1World, int par2, int par3, int par4, Random par5Random)
      {
          if (!par1World.isRemote && par1World.rand.nextInt(4) == 0)
          {
              byte b0 = 4;
              int l = 5;
              boolean flag = false;
              int i1;
              int j1;
              int k1;
              label138:
  
              for (i1 = par2 - b0; i1 <= par2 + b0; ++i1)
              {
                  for (j1 = par4 - b0; j1 <= par4 + b0; ++j1)
                  {
                      for (k1 = par3 - 1; k1 <= par3 + 1; ++k1)
                      {
                          if (par1World.getBlockId(i1, k1, j1) == this.blockID)
                          {
                              --l;
  
                              if (l <= 0)
                              {
                                  flag = true;
                                  break label138;
                              }
                          }
                      }
                  }
              }
  
              i1 = par1World.getBlockMetadata(par2, par3, par4);
              j1 = par1World.rand.nextInt(6);
              k1 = Direction.facingToDirection[j1];
              int l1;
              int i2;
  
              if (j1 == 1 && par3 < 255 && par1World.isAirBlock(par2, par3 + 1, par4))
              {
                  if (flag)
                  {
                      return;
                  }
  
                  l1 = par1World.rand.nextInt(16) & i1;
  
                  if (l1 > 0)
                  {
                      for (i2 = 0; i2 <= 3; ++i2)
                      {
                          if (!this.canBePlacedOn(par1World.getBlockId(par2 + Direction.offsetX[i2], par3 + 1, par4 + Direction.offsetZ[i2])))
                          {
                              l1 &= ~(1 << i2);
                          }
                      }
  
                      if (l1 > 0)
                      {
                          // CraftBukkit start - Call BlockSpreadEvent
                          org.bukkit.block.Block source = par1World.getWorld().getBlockAt(par2, par3, par4);
                          org.bukkit.block.Block block = par1World.getWorld().getBlockAt(par2, par3 + 1, par4);
                          CraftEventFactory.handleBlockSpreadEvent(block, source, this.blockID, l1);
                          // CraftBukkit end
                      }
                  }
              }
              else
              {
                  int j2;
  
                  if (j1 >= 2 && j1 <= 5 && (i1 & 1 << k1) == 0)
                  {
                      if (flag)
                      {
                          return;
                      }
  
                      l1 = par1World.getBlockId(par2 + Direction.offsetX[k1], par3, par4 + Direction.offsetZ[k1]);
  
                      if (l1 != 0 && Block.blocksList[l1] != null)
                      {
                          if (Block.blocksList[l1].blockMaterial.isOpaque() && Block.blocksList[l1].renderAsNormalBlock())
                          {
                              par1World.setBlockMetadataWithNotify(par2, par3, par4, i1 | 1 << k1, 2);
                          }
                      }
                      else
                      {
                          i2 = k1 + 1 & 3;
                          j2 = k1 + 3 & 3;
                          // CraftBukkit start - Call BlockSpreadEvent
                          org.bukkit.block.Block source = par1World.getWorld().getBlockAt(par2, par3, par4);
                          org.bukkit.block.Block block = par1World.getWorld().getBlockAt(par2 + Direction.offsetX[k1], par3, par4 + Direction.offsetZ[k1]);
  
                          if ((i1 & 1 << i2) != 0 && this.canBePlacedOn(par1World.getBlockId(par2 + Direction.offsetX[k1] + Direction.offsetX[i2], par3, par4 + Direction.offsetZ[k1] + Direction.offsetZ[i2])))
                          {
                              CraftEventFactory.handleBlockSpreadEvent(block, source, this.blockID, 1 << i2);
                          }
                          else if ((i1 & 1 << j2) != 0 && this.canBePlacedOn(par1World.getBlockId(par2 + Direction.offsetX[k1] + Direction.offsetX[j2], par3, par4 + Direction.offsetZ[k1] + Direction.offsetZ[j2])))
                          {
                              CraftEventFactory.handleBlockSpreadEvent(block, source, this.blockID, 1 << j2);
                          }
                          else if ((i1 & 1 << i2) != 0 && par1World.isAirBlock(par2 + Direction.offsetX[k1] + Direction.offsetX[i2], par3, par4 + Direction.offsetZ[k1] + Direction.offsetZ[i2]) && this.canBePlacedOn(par1World.getBlockId(par2 + Direction.offsetX[i2], par3, par4 + Direction.offsetZ[i2])))
                          {
                              block = par1World.getWorld().getBlockAt(par2 + Direction.offsetX[k1] + Direction.offsetX[i2], par3, par4 + Direction.offsetZ[k1] + Direction.offsetZ[i2]);
                              CraftEventFactory.handleBlockSpreadEvent(block, source, this.blockID, 1 << (k1 + 2 & 3));
                          }
                          else if ((i1 & 1 << j2) != 0 && par1World.isAirBlock(par2 + Direction.offsetX[k1] + Direction.offsetX[j2], par3, par4 + Direction.offsetZ[k1] + Direction.offsetZ[j2]) && this.canBePlacedOn(par1World.getBlockId(par2 + Direction.offsetX[j2], par3, par4 + Direction.offsetZ[j2])))
                          {
                              block = par1World.getWorld().getBlockAt(par2 + Direction.offsetX[k1] + Direction.offsetX[j2], par3, par4 + Direction.offsetZ[k1] + Direction.offsetZ[j2]);
                              CraftEventFactory.handleBlockSpreadEvent(block, source, this.blockID, 1 << (k1 + 2 & 3));
                          }
                          else if (this.canBePlacedOn(par1World.getBlockId(par2 + Direction.offsetX[k1], par3 + 1, par4 + Direction.offsetZ[k1])))
                          {
                              CraftEventFactory.handleBlockSpreadEvent(block, source, this.blockID, 0);
                          }
  
                          // CraftBukkit end
                      }
                  }
                  else if (par3 > 1)
                  {
                      l1 = par1World.getBlockId(par2, par3 - 1, par4);
  
                      if (l1 == 0)
                      {
                          i2 = par1World.rand.nextInt(16) & i1;
  
                          if (i2 > 0)
                          {
                              // CraftBukkit start - Call BlockSpreadEvent
                              org.bukkit.block.Block source = par1World.getWorld().getBlockAt(par2, par3, par4);
                              org.bukkit.block.Block block = par1World.getWorld().getBlockAt(par2, par3 - 1, par4);
                              CraftEventFactory.handleBlockSpreadEvent(block, source, this.blockID, i2);
                              // CraftBukkit end
                          }
                      }
                      else if (l1 == this.blockID)
                      {
                          i2 = par1World.rand.nextInt(16) & i1;
                          j2 = par1World.getBlockMetadata(par2, par3 - 1, par4);
  
                          if (j2 != (j2 | i2))
                          {
                              par1World.setBlockMetadataWithNotify(par2, par3 - 1, par4, j2 | i2, 2);
                          }
                      }
                  }
              }
          }
      }
  
      /**
       * Called when a block is placed using its ItemBlock. Args: World, X, Y, Z, side, hitX, hitY, hitZ, block metadata
       */
      public int onBlockPlaced(World par1World, int par2, int par3, int par4, int par5, float par6, float par7, float par8, int par9)
      {
          byte b0 = 0;
  
          switch (par5)
          {
              case 2:
                  b0 = 1;
                  break;
              case 3:
                  b0 = 4;
                  break;
              case 4:
                  b0 = 8;
                  break;
              case 5:
                  b0 = 2;
          }
  
          return b0 != 0 ? b0 : par9;
      }
  
      /**
       * Returns the ID of the items to drop on destruction.
       */
      public int idDropped(int par1, Random par2Random, int par3)
      {
          return 0;
      }
  
      /**
       * Returns the quantity of items to drop on block destruction.
       */
      public int quantityDropped(Random par1Random)
      {
          return 0;
      }
  
      /**
       * Called when the player destroys a block with an item that can harvest it. (i, j, k) are the coordinates of the
       * block and l is the block's subtype/damage.
       */
      public void harvestBlock(World par1World, EntityPlayer par2EntityPlayer, int par3, int par4, int par5, int par6)
      {
          super.harvestBlock(par1World, par2EntityPlayer, par3, par4, par5, par6);
      }
  
      @Override
      public boolean isShearable(ItemStack item, World world, int x, int y, int z)
      {
          return true;
      }
  
      @Override
      public ArrayList<ItemStack> onSheared(ItemStack item, World world, int x, int y, int z, int fortune)
      {
  