const pi = 3.14;
const pi2 = pi * 2;
const str = 'Hello';

void fun1(int x) => a * pi;
void fun2() => fun1(pi2);
void fun3() => const {
      'Key.a': 0.1,
      'Key.b': 0.1,
      'Key.c': 0.1,
    };
void fun4() {
  return const {1, 2};
}

void fun5() => const {1, 2};

void fun6() => const Map<String, String>();
