class_docstr: A generic container for immutable data that can be accessed either by
  numeric index or by key. This is similar to an
  :class:`collections.OrderedDict` except that the keys are optional and
  iteration over it returns the values instead of keys.
  
  This is the base class for both :class:`.Column` and :class:`.Row`.
  
  :param values:
      A sequence of values.
  :param keys:
      A sequence of keys.
docstr: Return state values to be pickled.
  
  This is necessary on Python2.7 when using :code:`__slots__`.
docstr_tok: ["Return","state","values","to","be","pickled",".","This","is","necessary","on","Python2.7","when","using",":","code",":","`","__slots__","`","."]
code: def __getstate__(self):
      """
      Return state values to be pickled.
  
      This is necessary on Python2.7 when using :code:`__slots__`.
      """
      return {"_values": self._values, "_keys": self._keys}
  
imports: from collections import OrderedDict
  from collections.abc import Sequence
  from agate.utils import memoize
label_desc: Use image node_id 2 for calling the MappedSequence obj's underlying member method code with example usage: obj.__getstate__() and returns: dict