MimeB64EncoderInit (int (*output_fn) (const char *, PRInt32, void *),
MimeB64EncoderInit (nsresult (*output_fn) (const char *, PRInt32, void *),
MimeB64EncoderInit (int (*output_fn) (const char *, PRInt32, void *),					void *closure){  return mime_encoder_init (mime_Base64, output_fn, closure);}