Method is

crates/vm/src/object/ext.rs:562–567

(&self, other: &T)

    #[inline(always)]
    fn is<T>(&self, other: &T) -> bool
    where
        T: AsObject,
    {
        self.get_id() == other.get_id()
    }

    #[inline(always)]
    fn class(&self) -> &Py<PyType> {