MetaModels\Attribute\Base::setBaseEval PHP Method

    private function setBaseEval($fieldDefinition, $overrides)
    {
        if ($this->isAllowedValue('isunique')) {
            $fieldDefinition['eval']['unique'] = (bool) $this->getOverrideValue('isunique', $overrides);
        }
        foreach (array('tl_class', 'mandatory', 'alwaysSave', 'chosen', 'allowHtml', 'preserveTags', 'decodeEntities', 'rte', 'rows', 'cols', 'spaceToUnderscore', 'includeBlankOption', 'submitOnChange', 'readonly') as $name) {
            if (empty($fieldDefinition['eval'][$name]) && ($value = $this->getOverrideValue($name, $overrides))) {
                $fieldDefinition['eval'][$name] = $value;
            }
        }
        // If we have unique, enforce mandatory.
        if (!empty($fieldDefinition['eval']['unique'])) {
            $fieldDefinition['eval']['mandatory'] = true;
        }
        return $fieldDefinition;
    }