§ 342. Action to restrain and prevent. The attorney-general may bring an action in the name and in behalf of the people of the state against any person, trustee, director, manager or other officer or agent of a corporation, or against a corporation, foreign or domestic, to restrain and prevent the doing in this state of any act herein declared to be illegal, or any act in, toward or for the making or consummation of any contract, agreement, arrangement or combination herein prohibited, wherever the same may have been made. In such an action, the court may award to the plaintiff a sum not in excess of twenty thousand dollars as an additional allowance.