library /*isNonNullableByDefault*/;
import self as self;

import "org-dartlang-testcase:///issue39938_lib.dart";

static method main() → dynamic
  ;
static method expect(dynamic expected, dynamic actual) → dynamic
  ;

library /*isNonNullableByDefault*/;
import self as self2;
import "dart:core" as core;

extension Extension on core::bool {
  operator + = self2::Extension|+;
}
static method Extension|+(lowered final core::bool #this, core::bool other) → core::bool
  ;