pub unsafe extern "C" fn switch_core_session_send_dtmf(
session: *mut switch_core_session_t,
dtmf: *const switch_dtmf_t,
) -> switch_status_tpub unsafe extern "C" fn switch_core_session_send_dtmf(
session: *mut switch_core_session_t,
dtmf: *const switch_dtmf_t,
) -> switch_status_t