CExpressionEntityField::getBuildFromChains

public function getBuildFromChains()
{
	if (is_null($this->buildFromChains))
	{
		$this->buildFromChains = array();

		foreach ($this->buildFrom as $elem)
		{
			$this->buildFromChains[] = CEntityQueryChain::getChainByDefinition($this->entity, $elem);
		}
	}

	return $this->buildFromChains;
}