Companion

The string used to flatten or un-flatten random variable parameters Assumed as "." by default

Splits the key into two strings based on the catChar regular expression. Since the flattened map of random variable parameters has a key that concatenates the name of the random variable with the parameter's name, this function can be used to separate them. The default concatenation string is held in rvParamConCatString, which is "." by default.