src/QueryBuilder/QueryBuilder.php
public function orderBy(?string $expression = null, ...$args): self
	{
		$this->dirty();
		$this->order = $expression === null ? null : [$expression];
		$this->args['order'] = $args;
		return $this;
	}
public function orderBy(?string $expression = null, ...$args): self
	{
		$this->dirty();
		$this->order = $expression === null ? null : [$expression];
		$this->args['order'] = $args;
		return $this;
	}
Sets expression as ORDER BY clause. Passing null sets clause to the default state.