function _ResizeObservation(target) {
    /**
     * Broadcasted width of content rectangle.
     *
     * @type {number}
     */
    this.broadcastWidth = 0
    /**
     * Broadcasted height of content rectangle.
     *
     * @type {number}
     */

    this.broadcastHeight = 0
    /**
     * Reference to the last observed content rectangle.
     *
     * @private {DOMRectInit}
     */

    this.contentRect_ = createRectInit(0, 0, 0, 0)
    this.target = target
  }
/**
   * Creates an instance of ResizeObservation.
   *
   * @param {Element} target - Element to be observed.
   */
Creates an instance of ResizeObservation.
@param {Element} target - Element to be observed.
Creates an instance of ResizeObservation . @param { Element } target - Element to be observed .
function _ResizeObservation(target) {
    this.broadcastWidth = 0
    this.broadcastHeight = 0
    this.contentRect_ = createRectInit(0, 0, 0, 0)
    this.target = target
  }
function _ResizeObservation ( target ) { this . broadcastWidth = 0 this . broadcastHeight = 0 this . contentRect_ = createRectInit ( 0 , 0 , 0 , 0 ) this . target = target }
Creates an instance of ResizeObservation.
Creates an instance of ResizeObservation .
/**
     * Broadcasted width of content rectangle.
     *
     * @type {number}
     */ /**
     * Broadcasted height of content rectangle.
     *
     * @type {number}
     */ /**
     * Reference to the last observed content rectangle.
     *
     * @private {DOMRectInit}
     */