public void TryGetLast_WithNonEmptyEnumerableAndContradictionalLambda_ExpectsFalse()
 => False(ENMRBL_EMPTY.TryGetLast(DefaultDelegates.ContradictionalLambda <MultiItems>(), out _));
 public void TryGetLast_WithEmptyEnumerable_ExpectsFalse()
 => False(ENMRBL_EMPTY.TryGetLast(DefaultDelegates.TautologicalLambda <MultiItems>(), out _));