EqualityBy<E, F> constructor

*<Null safety>*

EqualityBy<E, F>(F comparisonKey(E), [Equality<F> inner = const DefaultEquality()])

Implementation

EqualityBy(F Function(E) comparisonKey,
    [Equality<F> inner = const DefaultEquality<Never>()])
    : _comparisonKey = comparisonKey,
      _inner = inner;