docs: def _from_dict(cls, _dict):
          """Initialize a AnalysisResults object from a json dictionary."""
          args = {}
          if 'language' in _dict:
              args['language'] = _dict.get('language')
          if 'analyzed_text' in _dict:
              args['analyzed_text'] = _dict.get('analyzed_text')
          if 'retrieved_url' in _dict:
              args['retrieved_url'] = _dict.get('retrieved_url')
          if 'usage' in _dict:
              args['usage'] = AnalysisResultsUsage._from_dict(_dict.get('usage'))
          if 'concepts' in _dict:
              args['concepts'] = [
                  ConceptsResult._from_dict(x) for x in (_dict.get('concepts'))
              ]
          if 'entities' in _dict:
              args['entities'] = [
                  EntitiesResult._from_dict(x) for x in (_dict.get('entities'))
              ]
          if 'keywords' in _dict:
              args['keywords'] = [
                  KeywordsResult._from_dict(x) for x in (_dict.get('keywords'))
              ]
          if 'categories' in _dict:
              args['categories'] = [
                  CategoriesResult._from_dict(x)
                  for x in (_dict.get('categories'))
              ]
          if 'emotion' in _dict:
              args['emotion'] = EmotionResult._from_dict(_dict.get('emotion'))
          if 'metadata' in _dict:
              args['metadata'] = AnalysisResultsMetadata._from_dict(
                  _dict.get('metadata'))
          if 'relations' in _dict:
              args['relations'] = [
                  RelationsResult._from_dict(x) for x in (_dict.get('relations'))
              ]
          if 'semantic_roles' in _dict:
              args['semantic_roles'] = [
                  SemanticRolesResult._from_dict(x)
                  for x in (_dict.get('semantic_roles'))
              ]
          if 'sentiment' in _dict:
              args['sentiment'] = SentimentResult._from_dict(
                  _dict.get('sentiment'))
          if 'syntax' in _dict:
              args['syntax'] = SyntaxResult._from_dict(_dict.get('syntax'))
          return cls(**args)