setFinalValidationClosures example

$node->setAllowEmptyValue($this->allowEmptyValue);
        $node->addEquivalentValue(null, $this->nullEquivalent);
        $node->addEquivalentValue(true, $this->trueEquivalent);
        $node->addEquivalentValue(false, $this->falseEquivalent);
        $node->setRequired($this->required);

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

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

        return $node;
    }
}

$node->setNormalizationClosures($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 */