title: UISearchBarBackground Class
body: <p>I am using the following piece of code to hide the background on a UISearchBar:
  [[searchView.subviews objectAtIndex:0] setHidden:YES];
  Pretty simple, but I worry about hard coding a position in a subview list.
  So I went looking for the UISearchBarBackground.h file and cannot find it.
  Does any know where the definition is hiding?</p>