def METHOD_NAME(self):
    """
    _get_
    given the doc_id generated from the derived class, get the document and update
    the data in the dictionary from it
    """
    if not self.couch.documentExists(self.document_id):
        raise RuntimeError("Document: %s not found" % self.document_id)
    doc = self.couch.document(self.document_id)
    data = doc.METHOD_NAME(self.cdb_document_data, {})
    dict.update(self, data)
    return