Bug 183733 Implement the IScriptOjectClassInfo to provide the class infromation to support the JS code assistant.
Engine should implement the IScriptObjectClassInfo interface to return the class information for script object.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ExecutionContext.java
*/
		public Object getDesign( )
		{
			return scriptContext.eval( "design" );
		}
		/**
		 * get the report document.
		 * 
		 * @return report document.
		 */
		public Object getDocument( )
		{
			return reportDoc;
		}
		/**
		 * @return a map of name/value pairs for all the parameters and their
		 *         values
		 */
		public Map getParams( )
		{
			return params;
		}
		/**
		 * @return a set of data sets
		 */
		public Object getDataSets( )
		{
			return scriptContext.eval( "design.dataSets" );
		}
		/**