code: function(p) {
              var m = this.m;
              return {
                  x: m[0] * p.x + m[2] * p.y + m[4],
                  y: m[1] * p.x + m[3] * p.y + m[5]
              };
          }
docs: Transform point
  @method
  @memberof Kinetic.Transform.prototype
  @param {Object} 2D point(x, y)
  @returns {Object} 2D point(x, y)