Bug 212497 Need api to get all referencable report item with cube
Need model provide new api to return all referencable report items for dataset or cube respectively. For instance: getAvailableDataSetBindingReferenceList(); getAvailableCubeBindingReferenceList(); also keep current api: getAvailableDataBindingReferenceList().
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ReportItemHandle.java
* @see org.eclipse.birt.report.model.api.elements.structures.ParamBinding
	 */
	public Iterator paramBindingsIterator( )
	{
		PropertyHandle propHandle = getPropertyHandle( IReportItemModel.PARAM_BINDINGS_PROP );
		if ( propHandle == null )
			return Collections.EMPTY_LIST.iterator( );
		return propHandle.iterator( );
	}
	/**
	 * Sets a table of contents entry for this item. The TOC property defines an
	 * expression that returns a string that is to appear in the Table of
	 * Contents for this item or its container.
	 * 
	 * @param expression
	 *            the expression that returns a string
	 * @throws SemanticException
	 *             if the TOC property is locked by the property mask.
	 * 
	 * @see #getTocExpression()
	 * @deprecated
	 */
	public void setTocExpression( String expression ) throws SemanticException
	{
		if ( StringUtil.isEmpty( expression ) )
		{
			setProperty( IReportItemModel.TOC_PROP, null );
			return;
		}
		TOCHandle tocHandle = getTOC( );