fold<R> abstract method

R fold<R>(
  1. R onFailure(
    1. TrackerFailure failure
    ),
  2. R onSuccess(
    1. T value
    )
)

Folds the result into a single value.

Implementation

R fold<R>(
  R Function(TrackerFailure failure) onFailure,
  R Function(T value) onSuccess,
);