class Foo {
  sayName(a) {
    print(this.name);
    print(a);
  }
}

var foo1 = Foo();
foo1.name = "foo1";

var foo2 = Foo();
foo2.name = "foo2";

# Store the method reference on another object.
foo2.fn = foo1.sayName;
# Still retains original receiver.
foo2.fn(1);
# expect: foo1
# expect: 1