Bug 185898 ReportItemHandle needs to add two method: getAvailableDataBindingReferenceList and getDataBindingType.
ReportItemHandle needs to add two method: getAvailableDataBindingReferenceList and getDataBindingType. The first method provider the available ReportItem list of DataBindingReference. The second method provider the type of the DataBinding.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ReportItemHandle.java
* 
	 * @param dimension
	 *            the new value in application units.
	 * @throws SemanticException
	 *             if the property is locked.
	 */
	public void setWidth( double dimension ) throws SemanticException
	{
		setFloatProperty( IReportItemModel.WIDTH_PROP, dimension );
	}
	/**
	 * Gets a handle to deal with the item's width.
	 * 
	 * @return a DimensionHandle for the item's width.
	 */
	public DimensionHandle getWidth( )
	{
		return super.getDimensionProperty( IReportItemModel.WIDTH_PROP );
	}
	/**
	 * Gets a handle to deal with the item's height.
	 * 
	 * @return a DimensionHandle for the item's height.
	 */
	public DimensionHandle getHeight( )
	{
		return super.getDimensionProperty( IReportItemModel.HEIGHT_PROP );
	}
	/**
	 * Returns the bookmark of the report item.