Bug 214706 Script UID doens't work for Chart
Use chart "onRender" property handle and call ModuleUtil.getScriptUID(), it generates the id. But later use this id to get back the PropertyHandle or Script content, it fails.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/PropertyHandle.java
* handle and the definition of the property.
	 * 
	 * @param element
	 *            a handle to a report element
	 * @param prop
	 *            the definition of the property.
	 */
	public PropertyHandle( DesignElementHandle element, ElementPropertyDefn prop )
	{
		super( element );
		propDefn = prop;
	}
	
	public IElementPropertyDefn getPropertyDefn( )
	{
		return propDefn;
	}
	
	public IPropertyDefn getDefn( )
	{
		return propDefn;
	}
	
	public Object getValue( )
	{
		return elementHandle.getProperty( propDefn.getName( ) );
	}
	/**
	 * Implementation of abstract method defined in base class.
	 */