class_docstr: Fake message returned by pygrib.open().message(x).
class_docstr_tok: ["Fake","message","returned","by","pygrib.open","(",")",".message","(","x",")","."]
docstr: Get message keys.
docstr_tok: ["Get","message","keys","."]
code: def keys(self):
      """Get message keys."""
      return self.attrs.keys()
  
imports: import os
  import sys
  from unittest import mock
  import numpy
  import pytest
  import xarray
  from satpy.dataset import DataQuery
label_desc: Use image node_id 2 for calling the FakeMessage obj's underlying member method code with example usage: obj.keys() and returns: self