viewForAnnotation method
Returns an MLNAnnotationView if the given annotation is currently associated
with a view, otherwise nil.
@param annotation The annotation associated with the view.
Annotation must conform to the MLNAnnotation protocol.
Implementation
MLNAnnotationView? viewForAnnotation(MLNAnnotation annotation) {
final _ret = _objc_msgSend_1sotr3r(this.ref.pointer, _sel_viewForAnnotation_, annotation.ref.pointer);
return _ret.address == 0 ? null : MLNAnnotationView.castFromPointer(_ret, retain: true, release: true);
}