Constant Py_TPFLAGS_DISALLOW_INSTANTIATION
pub const Py_TPFLAGS_DISALLOW_INSTANTIATION: u64 = _; // 128u64Available on crate features
dep_pyo3 and std only.pub const Py_TPFLAGS_DISALLOW_INSTANTIATION: u64 = _; // 128u64dep_pyo3 and std only.