private static boolean throwStatementsAreEquivalent(@NotNull GrThrowStatement statement1,
                                                      @NotNull GrThrowStatement statement2) {
    final GrExpression exception1 = statement1.getException();
    final GrExpression exception2 = statement2.getException();
    return expressionsAreEquivalent(exception1, exception2);
  }
private static boolean throwStatementsAreEquivalent(@NotNull GrThrowStatement statement1,
                                                      @NotNull GrThrowStatement statement2)