pub unsafe extern "C" fn fluid_set_log_function(
level: c_int,
fun: fluid_log_function_t,
data: *mut c_void,
) -> fluid_log_function_tpub unsafe extern "C" fn fluid_set_log_function(
level: c_int,
fun: fluid_log_function_t,
data: *mut c_void,
) -> fluid_log_function_t