Bug 138562 Splite extendsexcpetion to seperate sub class
The suggestion is Parent invalid Cycle extends Different type extends Not top level extends
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ElementFactory.java
}
	/**
	 * Creates a new cell element. Cells cannot have a name.
	 * 
	 * @return a handle to the cell
	 */
	public CellHandle newCell( )
	{
		Cell element = new Cell( );
		module.makeUniqueName( element );
		return element.handle( module );
	}
	/**
	 * Creates a new grid item.
	 * 
	 * @param name
	 *            the optional grid item name. Can be <code>null</code>.
	 * @return a handle to the grid item
	 */
	public GridHandle newGridItem( String name )
	{
		GridItem element = new GridItem( name );
		module.makeUniqueName( element );
		return element.handle( module );
	}
	/**
	 * Creates a new grid item with pre-defined columns and rows.
	 * 
	 * @param name
	 *            the optional grid item name.