code: function clampSelf(low, high) {
           return this._set(me.Math.clamp(this.x, low, high), me.Math.clamp(this.y, low, high));
         }
docs: Clamp this vector value within the specified value range
  @name clampSelf
  @memberOf me.Vector2d
  @function
  @param {Number} low
  @param {Number} high
  @return {me.Vector2d} Reference to this object for method chaining