setAllowFalse example

$node->setDeprecated($this->deprecation['package'], $this->deprecation['version'], $this->deprecation['message']);
        }

        if (isset($this->normalization)) {
            $node->setNormalizationClosures($this->normalization->before);
            $node->setNormalizedTypes($this->normalization->declaredTypes);
            $node->setXmlRemappings($this->normalization->remappings);
        }

        if (isset($this->merge)) {
            $node->setAllowOverwrite($this->merge->allowOverwrite);
            $node->setAllowFalse($this->merge->allowFalse);
        }

        if (isset($this->validation)) {
            $node->setFinalValidationClosures($this->validation->rules);
        }

        return $node;
    }

    /** * Validate the configuration of a concrete node. * * @return void * * @throws InvalidDefinitionException */