9#import <Foundation/Foundation.h> 
   13+ (nullable NSString*)mp_stringWithContentsOfURL:(nonnull NSURL *)url
 
   14                            encoding:(NSStringEncoding)enc
 
   15                               error:(NSError * _Nullable * _Nullable)error;
 
   17+ (nullable NSString*)mp_stringWithContentsOfURL:(nonnull NSURL *)url
 
   18                              ifModifiedSince:(NSDate* _Nullable) ifModifiedSinceDate
 
   19                                     encoding:(NSStringEncoding)enc
 
   20                                        error:(NSError * _Nullable __autoreleasing * _Nullable)error
 
   21                                     response:(NSHTTPURLResponse * _Nullable __autoreleasing * _Nullable)response;
 
Definition NSString+UrlRequest.h:11