Method _contains

crates/vm/src/vm/vm_ops.rs:581–584

(&self, haystack: &PyObject, needle: &PyObject)

    }

    pub fn _contains(&self, haystack: &PyObject, needle: &PyObject) -> PyResult<bool> {
        let seq = haystack.sequence_unchecked();
        seq.contains(needle, self)
    }
}