@deftypefun {int} {gnutls_buffer_append_data} (gnutls_buffer_t @var{dest}, const void * @var{data}, size_t @var{data_size})
@var{dest}: the buffer to append to
@var{data}: the data
@var{data_size}: the size of @code{data}
Appends the provided @code{data} to the destination buffer.
@strong{Returns:} @code{GNUTLS_E_SUCCESS} on success, otherwise a negative error code.
@strong{Since:} 3.4.0
@end deftypefun