attachToCurrentScope(obj) {
	        return this.ctx.attachToCurrentScope(obj);
	    }
Attach a detached obj to the auto-release pool of the current scope.

@param obj The input obj.
@note Normally user do not need to call this function explicitly, as
      all library call return values are explicitly attached to
      the current scope. You only need to do so when you call
      {@link detachFromCurrentScope} to create a detached object.