@deftypefun {const char     *} {gnutls_supplemental_get_name} (gnutls_supplemental_data_format_type_t       @var{type})
@var{type}: is a supplemental data format type

Convert a @code{gnutls_supplemental_data_format_type_t}  value to a
string.

@strong{Returns:} a string that contains the name of the specified
supplemental data format type, or @code{NULL}  for unknown types.
@end deftypefun