constructor( outputNodes ) {

		super();

		/**
		 * A dictionary representing the MRT outputs. The key
		 * is the name of the output, the value the node which produces
		 * the output result.
		 *
		 * @type {Object<string, Node>}
		 */
		this.outputNodes = outputNodes;

		/**
		 * This flag can be used for type testing.
		 *
		 * @type {boolean}
		 * @readonly
		 * @default true
		 */
		this.isMRTNode = true;

	}
Constructs a new output struct node.

@param {Object<string, Node>} outputNodes - The MRT outputs.