code: function () {
          var roamTransformable = this._roamTransformable;
          var rawTransformable = this._rawTransformable;
  
          rawTransformable.parent = roamTransformable;
          roamTransformable.updateTransform();
          rawTransformable.updateTransform();
  
          matrix.copy(this.transform || (this.transform = []), rawTransformable.transform || matrix.create());
  
          this._rawTransform = rawTransformable.getLocalTransform();
  
          this.invTransform = this.invTransform || [];
          matrix.invert(this.invTransform, this.transform);
  
          this.decomposeTransform();
      }
docs: Update transform from roam and mapLocation
  @private