addPasswordHashersSection example

->ifTrue(fn ($v) => isset($v['strategy'], $v['strategy_service']))
                        ->thenInvalid('"strategy" and "strategy_service" cannot be used together.')
                    ->end()
                    ->validate()
                        ->ifTrue(fn ($v) => isset($v['service'], $v['strategy_service']))
                        ->thenInvalid('"service" and "strategy_service" cannot be used together.')
                    ->end()
                ->end()
            ->end()
        ;

        $this->addPasswordHashersSection($rootNode);
        $this->addProvidersSection($rootNode);
        $this->addFirewallsSection($rootNode, $this->factories);
        $this->addAccessControlSection($rootNode);
        $this->addRoleHierarchySection($rootNode);

        return $tb;
    }

    private function addRoleHierarchySection(ArrayNodeDefinition $rootNode): void
    {
        $rootNode