pub unsafe extern "C" fn pxtnService_set_sampled_callback(
this: *mut pxtnService,
proc_: pxtnSampledCallback,
user: *mut c_void,
) -> boolpub unsafe extern "C" fn pxtnService_set_sampled_callback(
this: *mut pxtnService,
proc_: pxtnSampledCallback,
user: *mut c_void,
) -> bool