@Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        UnmodifiableJMeterVariables other = (UnmodifiableJMeterVariables) obj;
        if (variables == null) {
            if (other.variables != null) {
                return false;
            }
        } else if (!variables.equals(other.variables)) {
            return false;
        }
        return true;
    }
@Test
    public void testEqualsObjectWithJMeterVariables() {
        assertThat(unmodifiables.equals(vars), CoreMatchers.is(vars.equals(unmodifiables)));
    }