def METHOD_NAME(self):
    r = TestRenderer()
    r.insert_field_after(
        field_to_insert={"inserted_in_middle": {}},
        after_this_field='one',
        field_group='test'
    )
    r.insert_field_after(
        field_to_insert={"inserted_last": {}},
        after_this_field='two',
        field_group='test'
    )
    assert len(r.FIELD_GROUPS['test']) == 4
    assert list(r.FIELD_GROUPS['test'][0].keys())[0] == 'one'
    assert list(r.FIELD_GROUPS['test'][1].keys())[0] == 'inserted_in_middle'
    assert list(r.FIELD_GROUPS['test'][2].keys())[0] == 'two'
    assert list(r.FIELD_GROUPS['test'][3].keys())[0] == 'inserted_last