xiidea / EasyConfigBundle

DependencyInjection/Configuration.php

<?php

namespace Xiidea\EasyConfigBundle\DependencyInjection;

use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;
use Symfony\Component\Config\Definition\Builder\TreeBuilder;
use Symfony\Component\Config\Definition\ConfigurationInterface;

class Configuration implements ConfigurationInterface
{
    const ROOT_NODE_NAME = 'xiidea_easy_config';

    public function getConfigTreeBuilder(): TreeBuilder
    {
        $treeBuilder = new TreeBuilder(self::ROOT_NODE_NAME);
        $rootNode = $treeBuilder->getRootNode();

        $this->addRequiredConfigs($rootNode);

        return $treeBuilder;
    }

    private function addRequiredConfigs(ArrayNodeDefinition $rootNode)
    {
        $rootNode
            ->children()
                ->scalarNode('config_class')
                    ->cannotBeOverwritten()
                    ->isRequired()
                    ->cannotBeEmpty()
                ->end()
            ->end();

The method end() does not exist on Symfony\Component\Config\Definition\Builder\NodeParentInterface. It seems like you code against a sub-type of said class. However, the method does not exist in Symfony\Component\Config\Definition\Builder\TreeBuilder. Are you sure you never get one of those?

    }
}