pub type Gsasl_server_callback_securid = Option<unsafe extern "C" fn(sctx: *mut Gsasl_session, authentication_id: *const c_char, authorization_id: *const c_char, passcode: *const c_char, pin: *mut c_char, suggestpin: *mut c_char, suggestpinlen: *mut size_t) -> c_int>;