resetFirstLastAndInvertValues_ () {
    this.first_.layout = null;
    this.first_.opacity = 0;

    this.last_.layout = null;
    this.last_.opacity = 0;

    this.invert_.x = 0;
    this.invert_.y = 0;
    this.invert_.sx = 1;
    this.invert_.sy = 1;
    this.invert_.a = 0;
  }
Reset the values held by first_, last_, and invert_.

@private