This is an asynchronious call. In order to get result of this operation please use @see MapObserver#onMapChanged or @see MapObserver#onMapLoadError. In case of successfull style load you should get @see MapChange#DidFinishLoadingStyle. And in case of error @see MapLoadError#StyleLoadError will be generated.
\attention This method should be called on the same thread where @see Map object is initialized.