public bool Equals(IImmutableEnumeratorElement <U> other) => Equality.Equatable <IImmutableEnumeratorElement <U> >(this, other);
public bool Equals(Unit other) => Equality.Equatable <Unit>(this, other);
public bool Equals(PartialEqF <T1, T2, U> other) => Equality.Equatable <PartialEqF <T1, T2, U> >(this, other);