fold abstract method

Resolvable<Object> fold(
  1. @noFutures Resolvable<Object>? onSync(
    1. Sync<T> sync
    ),
  2. @noFutures Resolvable<Object>? onAsync(
    1. Async<T> async
    )
)

Handles Sync and Async cases to produce a new Resolvable.

Implementation

Resolvable<Object> fold(
  @noFutures Resolvable<Object>? Function(Sync<T> sync) onSync,
  @noFutures Resolvable<Object>? Function(Async<T> async) onAsync,
);