@Override
    public Object removeVariableLocally(String name) {
        return variables.remove(name);
    }
@Test
    public void testRemoveVariableLocally() {
        ProcessContextImpl context = new ProcessContextImpl();
        context.setVariable("key", "value");
        context.removeVariableLocally("key");
        Assertions.assertEquals(0, context.getVariables().size());
    }