code: def _get_alphabetical_members(obj, predicate):
      
      fields = dict(inspect.getmembers(obj, predicate))
      keys = list(fields.keys())
      keys.sort()
      return {k: fields[k] for k in keys}
docs: Get members of an object, sorted alphabetically.
  
      Parameters
      ----------
      obj
          An object.
      predicate : callable
          Callable that takes an attribute and returns a bool of whether the
          attribute should be returned or not.
  
      Returns
      -------
      members : `dict`
          Dictionary of
  
          - Keys: attribute name
          - Values: attribute
  
          The dictionary is ordered according to the attribute name.
  
      Notes
      -----
      This uses the insertion-order-preserved nature of `dict` in Python 3.6+.
  
      See also
      --------
      `inspect.getmembers`