{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"assert_matches(\"Foo::do_stuff($a,"}]}
    assert_matches("Foo::do_stuff($a, 2)", code, &["f.do_stuff(2)"]);
    // and the first argument is different.
    assert_matches("Foo::do_stuff(Foo::new(4), $b)", code, &["Foo::new(4).do_stuff(3)"]);