code: def parse_model_group_list(path, groups):
      
  
      context = FilePathContext(path)
      for model_group in groups:
          if 'include' in model_group:
              include_context = context.resolve(model_group['include'])
              for reaction_id in parse_model_file(include_context):
                  yield reaction_id
          else:
              for reaction_id in parse_model_group(context, model_group):
                  yield reaction_id
docs: Parse a structured list of model groups as obtained from a YAML file
  
      Yields reaction IDs. Path can be given as a string or a context.