Bug 204245 Blank column on visibility column in excel[0300]
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFTableLM.java
isNewArea = false;
		}
		skipCachedRow( );
		return super.traverseChildren( );
	}
	
	public boolean isCellVisible( ICellContent cell )
	{
		return true;
	}
	protected void repeat( )
	{
		addCaption( tableContent.getCaption( ) );
		repeatHeader( );
	}
	public void startGroup( IGroupContent groupContent )
	{
		int groupLevel = groupContent.getGroupLevel( );
		groupStack.push( new Integer( groupLevel ) );
	}
	public int endGroup( IGroupContent groupContent )
	{
		
		int groupLevel = groupContent.getGroupLevel( );
		int height = 0;
		height = updateUnresolvedCell( groupLevel, false );
		height += updateUnresolvedCell( groupLevel, true );
		
		assert ( !groupStack.isEmpty( ) );
		groupStack.pop( );