pub unsafe extern "C" fn vl_msg_traverse_trace(
tp: *mut vl_api_trace_t,
fn_: vl_msg_traverse_trace_fn,
ctx: *mut c_void,
) -> c_intpub unsafe extern "C" fn vl_msg_traverse_trace(
tp: *mut vl_api_trace_t,
fn_: vl_msg_traverse_trace_fn,
ctx: *mut c_void,
) -> c_int