Function pyo3::ffi::_Py_CheckFunctionResult

pub unsafe extern "C" fn _Py_CheckFunctionResult(
    tstate: *mut PyThreadState, 
    callable: *mut PyObject, 
    result: *mut PyObject, 
    where_: *const c_char
) -> *mut PyObject

This is supported on Py_3_8 and non-PyPy only.