function PinchRecognizer() {
    classCallCheck(this, PinchRecognizer);
    return possibleConstructorReturn(this, (PinchRecognizer.__proto__ || Object.getPrototypeOf(PinchRecognizer)).apply(this, arguments));
  }
@private
Pinch
Recognized when two or more pointers are moving toward (zoom-in) or away from each other (zoom-out).
@constructor
@extends AttrRecognizer