code: def validate(cls, job_config):
      
      super(DatastoreInputReader, cls).validate(job_config)
      params = job_config.input_reader_params
      entity_kind = params[cls.ENTITY_KIND_PARAM]
      # Check for a "." in the entity kind.
      if "." in entity_kind:
        logging.warning(
            ". detected in entity kind %s specified for reader %s."
            "Assuming entity kind contains the dot.",
            entity_kind, cls.__name__)
      # Validate the filters parameters.
      if cls.FILTERS_PARAM in params:
        filters = params[cls.FILTERS_PARAM]
        for f in filters:
          if f[1] != "=":
            raise errors.BadReaderParamsError(
                "Only equality filters are supported: %s", f)
docs: Inherit docs.