constructor(x, y, scope = globalScope, dir = "RIGHT") {
        super(x, y, scope, dir, 8);
        /* this is done in this.baseSetup() now
        this.scope['Arrow'].push(this);
        */
        this.rectangleObject = false;
        this.fixedBitWidth = true;
        this.setDimensions(30, 20);
    }
@class
Arrow
@extends CircuitElement
@param {number} x - x coordinate of element.
@param {number} y - y coordinate of element.
@param {Scope=} scope - Cirucit on which element is drawn
@param {string=} dir - direction of element
@category modules