constructor( op, aNode, bNode, ...params ) {

		super();

		if ( params.length > 0 ) {

			let finalOp = new OperatorNode( op, aNode, bNode );

			for ( let i = 0; i < params.length - 1; i ++ ) {

				finalOp = new OperatorNode( op, finalOp, params[ i ] );

			}

			aNode = finalOp;
			bNode = params[ params.length - 1 ];

		}

		/**
		 * The operator.
		 *
		 * @type {string}
		 */
		this.op = op;

		/**
		 * The first input.
		 *
		 * @type {Node}
		 */
		this.aNode = aNode;

		/**
		 * The second input.
		 *
		 * @type {Node}
		 */
		this.bNode = bNode;

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

	}
Constructs a new operator node.

@param {string} op - The operator.
@param {Node} aNode - The first input.
@param {Node} bNode - The second input.
@param {...Node} params - Additional input parameters.