Get fields in fragment of a #graphql query

resolver.js

async producers(_: any, __: any, ___: any, { fragments }: Object) {
    const fields = flatten(values(fragments).map(data => data.selectionSet.selections.map(f => f.name.value)));
    if (
      intersection(fields, [
        'owner',
        'totalVotes',
        'producerKey',
        'isActive',
        'url',
        'unpaidBlocks',
        'lastClaimTime',
        'location',
      ]).length > 0
    ) {
      const bpList = await postEOS('/chain/get_table_rows', {
        json: true,
        code: 'eosio',
        scope: 'eosio',
        table: 'producers',
        limit: 100000,
      });
    }
  },