ListBuilder/DynamicListFactory.php
protected function getBuilder($alias = null)
    {
        if (!$alias || 'default' === $alias) {
            $alias = $this->defaultBuilder;
        }

        if (!$this->builders[$alias]) {
            throw new \Exception(sprintf('Bilder with the name "%s" not found.', $alias));
        }

        return $this->builders[$alias];
    }
protected function getBuilder($alias = null)
    {
        if (!$alias || 'default' === $alias) {
            $alias = $this->defaultBuilder;
        }

        if (!$this->builders[$alias]) {
            throw new \Exception(sprintf('Bilder with the name "%s" not found.', $alias));
        }

        return $this->builders[$alias];
    }
Get builder.

@param string $alias

@return DynamicListBuilderInterface

@throws \Exception