Constant Py_TPFLAGS_DISALLOW_INSTANTIATION
pub const Py_TPFLAGS_DISALLOW_INSTANTIATION: u64 = _; // 128u64Available on crate feature
tls and Py_3_10 only.pub const Py_TPFLAGS_DISALLOW_INSTANTIATION: u64 = _; // 128u64tls and Py_3_10 only.