scrollHandleDidStop () {
    this._scrollHandleIndex = null
    this._scrollHandleStartPosition = null
    this._scrollHandleStartTime = null
  }
/**
   * Triggered when scroll handle stops scrolling.
   */
Triggered when scroll handle stops scrolling.
Triggered when scroll handle stops scrolling .
scrollHandleDidStop () {
    this._scrollHandleIndex = null
    this._scrollHandleStartPosition = null
    this._scrollHandleStartTime = null
  }
scrollHandleDidStop ( ) { this . _scrollHandleIndex = null this . _scrollHandleStartPosition = null this . _scrollHandleStartTime = null }
Triggered when scroll handle stops scrolling.
Triggered when scroll handle stops scrolling .