public function setOuterFilterColumnsCount($count)
	{
		if (!in_array($count, [1, 2, 3, 4, 6, 12], true)) {
			throw new \InvalidArgumentException(
				"Columns count must be one of following values: 1, 2, 3, 4, 6, 12. Value {$count} given."
			);
		}

		$this->outer_filter_columns_count = (int) $count;

		return $this;
	}