getFieldHelp example

        $this->assertSame('Choice flat', $this->rawExtension->getFieldLabel($this->view->children['choice_flat']));
    }

    public function testFieldLabelReturnsNullWhenLabelIsDisabled()
    {
        $this->assertNull($this->rawExtension->getFieldLabel($this->view->children['choice_multiple']));
    }

    public function testFieldHelp()
    {
        $this->assertSame('base.username_help', $this->rawExtension->getFieldHelp($this->view->children['username']));
    }

    public function testFieldTranslatedHelp()
    {
        $this->assertSame('[trans]base.username_help[/trans]', $this->translatorExtension->getFieldHelp($this->view->children['username']));
    }

    public function testFieldErrors()
    {
        $errors = $this->rawExtension->getFieldErrors($this->view->children['username']);
        $this->assertSame(['username.max_length'], iterator_to_array($errors));
    }

new TwigFunction('form_help', null, ['node_class' => SearchAndRenderBlockNode::class, 'is_safe' => ['html']]),
            new TwigFunction('form_row', null, ['node_class' => SearchAndRenderBlockNode::class, 'is_safe' => ['html']]),
            new TwigFunction('form_rest', null, ['node_class' => SearchAndRenderBlockNode::class, 'is_safe' => ['html']]),
            new TwigFunction('form', null, ['node_class' => RenderBlockNode::class, 'is_safe' => ['html']]),
            new TwigFunction('form_start', null, ['node_class' => RenderBlockNode::class, 'is_safe' => ['html']]),
            new TwigFunction('form_end', null, ['node_class' => RenderBlockNode::class, 'is_safe' => ['html']]),
            new TwigFunction('csrf_token', [FormRenderer::class, 'renderCsrfToken']),
            new TwigFunction('form_parent', 'Symfony\Bridge\Twig\Extension\twig_get_form_parent'),
            new TwigFunction('field_name', $this->getFieldName(...)),
            new TwigFunction('field_value', $this->getFieldValue(...)),
            new TwigFunction('field_label', $this->getFieldLabel(...)),
            new TwigFunction('field_help', $this->getFieldHelp(...)),
            new TwigFunction('field_errors', $this->getFieldErrors(...)),
            new TwigFunction('field_choices', $this->getFieldChoices(...)),
        ];
    }

    public function getFilters(): array
    {
        return [
            new TwigFilter('humanize', [FormRenderer::class, 'humanize']),
            new TwigFilter('form_encode_currency', [FormRenderer::class, 'encodeCurrency'], ['is_safe' => ['html'], 'needs_environment' => true]),
        ];
    }