An Act amending the act of November 22, 1968 (P. L. 1080, No. 333), entitled "An act authorizing courts of record to grant witnesses immunity from prosecution for or on account of any matter or thing concerning which they were ordered to testify in a proceeding before certain grand juries, investigating committees or commissions and courts of record; making the refusal to testify after such immunity criminal contempt and providing penalties," further providing for the granting of immunity.