docs: function getIdFetcher(graffitiModels) {
    return function idFetcher(obj, { id: globalId }, context, info) {
      const { type, id } = fromGlobalId(globalId);
  
      if (type === 'Viewer') {
        return viewer;
      } else if (graffitiModels[type]) {
        const Collection = graffitiModels[type].model;
        return getOne(Collection, { id }, context, info);
      }
  
      return null;
    };
  }