eZ\Publish\Core\FieldType\FieldType::applyDefaultValidatorConfiguration PHP Method

    public function applyDefaultValidatorConfiguration(&$validatorConfiguration)
    {
        if ($validatorConfiguration !== null && !is_array($validatorConfiguration)) {
            throw new InvalidArgumentType('$validatorConfiguration', 'array|null', $validatorConfiguration);
        }
        foreach ($this->getValidatorConfigurationSchema() as $validatorName => $configurationSchema) {
            // Set configuration of specific validator to empty array if it is not already provided
            if (!isset($validatorConfiguration[$validatorName])) {
                $validatorConfiguration[$validatorName] = array();
            }
            foreach ($configurationSchema as $settingName => $settingConfiguration) {
                // Check that a default entry exists in the configuration schema for the validator but that no value has been provided
                if (!isset($validatorConfiguration[$validatorName][$settingName]) && array_key_exists('default', $settingConfiguration)) {
                    $validatorConfiguration[$validatorName][$settingName] = $settingConfiguration['default'];
                }
            }
        }
    }