code: def from_dict(cls, cls_dict, fallback_xsi_type=None):
          
          if not cls_dict:
              return None
          
          if isinstance(cls_dict, six.string_types):
              if not getattr(cls, "_convert_strings", False):
                  return cls_dict
  
          try:
              typekey = cls.dictkey(cls_dict)
          except TypeError:
              typekey = fallback_xsi_type
          klass   = cls.entity_class(typekey)
          return klass.from_dict(cls_dict)
docs: Parse the dictionary and return an Entity instance.
  
          This will attempt to extract type information from the input
          dictionary and pass it to entity_class to resolve the correct class
          for the type.
  
          Args:
              cls_dict: A dictionary representation of an Entity object.
              fallback_xsi_type: An xsi_type to use for string input, which
              doesn't have properties
  
          Returns:
              An Entity instance.