code: def validate(spec, data):
      
      data = copy.deepcopy(data)
      validated_data = {}
  
      def validate_keys(section, config, section_data):
          if not isinstance(section_data, dict) or section == spec.MODEL:
              return
  
          extra_args = [key for key in section_data.keys() if key not in config.SCHEMA().fields]
          if extra_args:
              raise PolyaxonfileError('Extra arguments passed for `{}`: {}'.format(
                  section, extra_args))
  
      def add_validated_section(section, config):
          if data.get(section):
              section_data = data[section]
              validate_keys(section=section, config=config, section_data=section_data)
              validated_data[section] = config.from_dict(section_data)
  
      add_validated_section(spec.ENVIRONMENT, spec.ENVIRONMENT_CONFIG)
      add_validated_section(spec.BUILD, BuildConfig)
      add_validated_section(spec.RUN, RunConfig)
      add_validated_section(spec.MODEL, ModelConfig)
      add_validated_section(spec.TRAIN, TrainConfig)
      add_validated_section(spec.EVAL, EvalConfig)
  
      return validated_data
docs: Validates the data and creates the config objects