docs: def to_bool(value):
      # type: (Any) -> bool
      """
      Convert a value into a bool but handle "truthy" strings eg, yes, true, ok, y
      """
      if isinstance(value, _compat.string_types):
          return value.upper() in ('Y', 'YES', 'T', 'TRUE', '1', 'OK')
      return bool(value)