pkg/front_end/testcases/inference/bug30620_d.dart.strong.expect

library test;
import self as self;
import "dart:core" as core;

static method foo(dynamic obj) → core::String?
  return obj is core::String ?{core::String?} obj{core::String}.{core::String::toUpperCase}(){() → core::String} : null;
static method main() → dynamic {}