Good lord, where is NSString replaceWithPattern: ?!?!?!?!??!!?!?

gistfile1.m

  int count = 1;
    while ( [[NSFileManager defaultManager] fileExistsAtPath:[self filePath]] ) {

        NSRegularExpression *regex = 
            [NSRegularExpression regularExpressionWithPattern:@"\\s\\(\\d\\)"
                                                      options:NSRegularExpressionCaseInsensitive
                                                        error:NULL];
        
         NSString* str = [regex stringByReplacingMatchesInString:self.name
                                                         options:0 
                                                           range:NSMakeRange(0, [self.name length]) 
                                                    withTemplate:@""];
        
        [self setName:[NSString stringWithFormat:@"%@ (%d)", str, count] ];
        
        count++;
    }