jmeter randomly selected user-defined variables values

$ {__ RandomFromMultipleVars (user-defined variables 1 | user-defined variable 2)}

A Usage: to be taken in a beanshell random value to the variable s, ss can be directly referenced in reference

s=${__RandomFromMultipleVars(P1|P2,)};
vars.put("ss",s.toString());

Usage II: or elsewhere in the request directly to the variable assignment, directly $ {__ RandomFromMultipleVars (user-defined variables 1 | user-defined variable 2)}