title: Incompatible pointer types sending 'NSString *__strong *' to parameter of type 'NSError * _Nullable __autoreleasing * _Nullable'
body: <p>I am facing this warning in my project. Welcome to suggestions.. and Thanks :).</p>
  
  <p>This is my code :</p>
  
  <pre><code>NSString *profile = @"Profile";
  NSData *data = [profile dataUsingEncoding:NSUTF8StringEncoding];
  NSString *error;
  NSPropertyListFormat format;
  NSDictionary *dict = [NSPropertyListSerialization propertyListWithData:data options:NSPropertyListImmutable format:&amp;format error:&amp;error];
  </code></pre>