Function resolve

packages/graphiql/test/schema.js:195–201

(_value, _args)

    friends: {
      type: new GraphQLList(Person),
      async *resolve(_value, _args) {
        const names = ['James', 'Mary', 'John', 'Patrica']; // Top 4 names https://ssa.gov/oact/babynames/decades/century.html
        for (const name of names) {
          await sleep(100);
          yield { name };
        }
      },
    },
  }),
});