anchor.diff:    static void set field2(int value) {}
     //              ^^^^^^
     // [analyzer] COMPILE_TIME_ERROR.DUPLICATE_DEFINITION
  -  // [cfe] unspecified
   }
   
   // Check instance members colliding with instance members (of the same kind).
  
positive.code: // Check an instance method colliding with a static setter.
  extension E14 on int {
    int method() => 0;
    static void set method(int value) {}
    //              ^^^^^^
    // [analyzer] COMPILE_TIME_ERROR.EXTENSION_CONFLICTING_STATIC_AND_INSTANCE
    // [cfe] unspecified
  }
  
  // Check an instance method colliding with a static field.
  
negative.code:   static int method() => 0;
    //         ^^^^^^
    // [analyzer] COMPILE_TIME_ERROR.EXTENSION_CONFLICTING_STATIC_AND_INSTANCE
    // [cfe] Conflicts with setter 'method'.
    void set method(int value) {}
    //       ^
    // [cfe] Conflicts with member 'method'.
  }
  
  // Check an instance method colliding with a static getter.
  