§ 8120. Setoff. This chapter shall apply to any debt alleged by way of setoff or counterclaim on the part of a defendant. The time of limitation of such debt shall be computed in like manner as if an action therefor had been commenced at the time when the plaintiff’s action commenced.Code 1852, § 2754; Code 1915, § 4682; Code 1935, § 5140; 10 Del. C. 1953, § 8119;