public function provideOneElementValues()
{
(yield 'one value' => [new FakeValue(), new FakeValue()]);
(yield 'one string value' => ['foo', 'foo']);
(yield 'a list of one value' => [new ListValue([new FakeValue()]), new FakeValue()]);
(yield 'a function fixture reference' => [new ListValue(['azer', 'ty']), 'azerty']);
}