code: def _search(self):
          
          results = []
          for _id in self.doc_dict:
              entry = self.doc_dict[_id]
              if entry.doc is not None:
                  results.append(entry.merged_dict)
          return results
docs: Returns all documents in the doc dict.
  
          This function is not a part of the DocManager API, and is only used
          to simulate searching all documents from a backend.