library test;

class A {}

class B extends A {
  A operator +(C v) => null;
  B operator -(int i) => null;
  B operator *(B v) => null;
  C operator &(A v) => null;
  static B staticVariable;
}

class C extends B {}

T f<T>() => null;
B topLevelVariable;
void test_topLevelVariable() {}
void test_staticVariable() {}
main() {}