map2<C, D> method
Change type of this ReaderTask based on its value of type A
and the
value of type C
of another ReaderTask.
Implementation
@override
ReaderTask<E, D> map2<C, D>(
covariant ReaderTask<E, C> mc, D Function(A a, C c) f) =>
flatMap(
(a) => mc.map(
(c) => f(a, c),
),
);