interface Lambda {
    String doSomething(String parameter);
}

public static void main(String[] args) {
    Lambda Lambda1 = parameter1 -> "any";
    Lambda Lambda2 = parameter2 -> "any";
    Lambda Lambda3 = parameter3 -> "any";

    check("parameter1", getNameArgument(Lambda1));
    check("parameter2", getNameArgument(Lambda2));
    check("parameter3", getNameArgument(Lambda3));

}

public static void check(String expected, String actual){
    if (!expected.equals(actual)) {
        throw new RuntimeException("you've written bad method");
    }
}

public static String getNameArgument(Ihar ihar) {
    // need to write method, that returns lambda's name argument
    return null;
}