eZ\Publish\Core\MVC\Symfony\Templating\Twig\FieldBlockRenderer::getBlockByName PHP Method

    private function getBlockByName($name, $resourcesName)
    {
        if (isset($this->blocks[$name])) {
            return [$name => $this->blocks[$name]];
        }
        foreach ($this->{$resourcesName} as &$template) {
            if (!$template instanceof Twig_Template) {
                $template = $this->twig->loadTemplate($template['template']);
            }
            $tpl = $template;
            $block = $this->searchBlock($name, $tpl);
            if ($block !== null) {
                $this->blocks[$name] = $block;
                return [$name => $block];
            }
        }
        throw new MissingFieldBlockException("Cannot find '{$name}' template block.");
    }