code: def query(options, collection_name, num_to_skip, num_to_return,
            query, field_selector, opts, check_keys=False, ctx=None):
      
      if ctx:
          return _query_compressed(options, collection_name, num_to_skip,
                                   num_to_return, query, field_selector,
                                   opts, check_keys, ctx)
      return _query_uncompressed(options, collection_name, num_to_skip,
                                 num_to_return, query, field_selector, opts,
                                 check_keys)
docs: Get a **query** message.