code: def __contains__(self, val: Any) -> bool:
      return self._hasval(val)
  
file_path: scattertext/scattertext/indexstore/IndexStore.py
imports: from typing import Any, Iterable, List, Set, Tuple
label_desc: Use image node_id 5 for calling the IndexStore obj's underlying member method code with example usage: obj.__contains__(val) and returns: self