Constant pyo3_ffi::cpython::abstract_::PY_VECTORCALL_ARGUMENTS_OFFSET

const PY_VECTORCALL_ARGUMENTS_OFFSET: Py_ssize_t = 1 << (8 * std::mem::size_of::<Py_ssize_t>() as Py_ssize_t - 1); // -9_223_372_036_854_775_808isize