code: public function andWhere(string $expression, ...$args): self
  	{
  		$this->dirty();
  		$this->where = $this->where ? '(' . $this->where . ') AND (' . $expression . ')' : $expression;
  		$this->pushArgs('where', $args);
  		return $this;
  	}
docs: Adds expression with AND to WHERE clause.