Bug 140620 Chart scripting errors are ignored
Write a chart with an invalid script, the execution simply ignores the script. This makes it difficult to debug scripting. The error message is also not precise and needs improvements.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/component/impl/EStringToDataSetMapEntryImpl.java
*/
	public DataSet getTypedValue( )
	{
		if ( value != null && value.eIsProxy( ) )
		{
			InternalEObject oldValue = (InternalEObject) value;
			value = (DataSet) eResolveProxy( oldValue );
			if ( value != oldValue )
			{
				if ( eNotificationRequired( ) )
					eNotify( new ENotificationImpl( this,
							Notification.RESOLVE,
							ComponentPackage.ESTRING_TO_DATA_SET_MAP_ENTRY__VALUE,
							oldValue,
							value ) );
			}
		}
		return value;
	}
	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public DataSet basicGetTypedValue( )
	{
		return value;
	}
	/**
	 * <!-- begin-user-doc -->