pub unsafe extern "C" fn mtp_session_state_size(
s: *const mtp_session,
seq_id: i32,
out_size: *mut usize,
) -> mtp_state_statuspub unsafe extern "C" fn mtp_session_state_size(
s: *const mtp_session,
seq_id: i32,
out_size: *mut usize,
) -> mtp_state_status