Function is_builtin

crates/vm/src/stdlib/_imp.rs:190–192

(name: PyUtf8StrRef, vm: &VirtualMachine)

    #[pyfunction]
    fn is_builtin(name: PyUtf8StrRef, vm: &VirtualMachine) -> bool {
        vm.state.module_defs.contains_key(name.as_str())
    }

    #[pyfunction]
    fn is_frozen(name: PyUtf8StrRef, vm: &VirtualMachine) -> bool {