text: //
  //  OAuthCore.h
  //
  //  Created by Loren Brichter on 6/9/10.
  //  Copyright 2010 Loren Brichter. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  extern NSString *OAuthorizationHeader(NSURL *url, 
                      NSString *method, 
                      NSData *body, 
                      NSString *_oAuthConsumerKey, 
                      NSString *_oAuthConsumerSecret, 
                      NSString *_oAuthToken, 
                      NSString *_oAuthTokenSecret);
  