public function toArray()
{
if (!$this->referencedTable) {
throw new Mesour\Sources\InvalidStateException('Referenced table is required. Use method setReferencedTable.');
}
if (!$this->selfColumn) {
throw new Mesour\Sources\InvalidStateException('Self column is required. Use method setReferencedTable.');
}
return array_merge(parent::toArray(), ['referencedTable' => $this->referencedTable, 'selfColumn' => $this->selfColumn]);
}
