Param object/function doco?

Where can a find complete documentation on the param object member functions. I find nothing comprehensive in the Blynk doc, just scattered references in example code, like the code linked below:

I think the options are Int, Float and String.
I have seen the options listed somewhere, maybe in the library code, but I don’t have time to find it now.

TBH Int, Float and String give you all the options you need anyway.