Bravo3\Orm\Mappers\Yaml\YamlMapWriter::compileSortables PHP Method

    private function compileSortables(array $sortables)
    {
        $out = [];
        foreach ($sortables as $index) {
            $data = [];
            if ($index->getColumn()) {
                $data[Schema::INDEX_COLUMN] = $index->getColumn();
            }
            $conditions = $this->compileConditions($index->getConditions());
            if ($conditions) {
                $data[Schema::INDEX_CONDITIONS] = $conditions;
            }
            $out[$index->getName()] = $data;
        }
        return $out;
    }