class A {
    void foo() {
        Map<String, String> a = Map.of("foo", "bar");
        Map<String, String> b = new HashMap<>(a) {{
            put("irrelevantKey", "irrelevantValue");
        }};
    }
}

class A {
    void foo() {
        Map<String, String> a = Map.of("foo", "bar");
        Map<String, String> b = new HashMap<>(a);
        b.put("irrelevantKey", "irrelevantValue");
    }
}

class A {
    void foo() {
        Map<String, String> a = Map.of("foo", "bar");
        Map<String, String> b = new HashMap<>();   // <= No `a` here anymore
        b.put("irrelevantKey", "irrelevantValue");
    }
}