code: public function queryMapRow(string $key, $removeColumnFromRow = false)
  	{
  		return $this->selector->map($this->getSelect(), $key, $removeColumnFromRow);
  	}
docs: Return an array where the result of one column is the index and loaded object is the value.
  @param string $key Name of the key column.
  @param bool $removeColumnFromRow Should remove the key column from values before converting them to objects.
  @return array|false