message: Rendered right UIBarButtonItem!
diff: #import "UIBarButtonHostView.h"
  +#import <UIKit/UIKit.h>
  +#import <React/UIView+React.h>
  @implementation UIBarButtonHostView
  - (void)didMoveToWindow
  {
  [super didMoveToWindow];
  + UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithTitle:@"Test" style:UIBarButtonItemStylePlain target:nil action:nil];
  + [self.reactViewController.navigationItem setRightBarButtonItem:item animated:YES];
  }
  @end
  