Where to find value of argument in Inputs.GetProperty("anyvariable")?

Hi Oracle Community,

I am looking for some orientation which sources to look for when it comes to code parts using Inputs.GetProperty and you want to know which value is the GetProperty referring to. For example

var strRowID = Inputs.GetProperty("strRowID");

strRowID is being declared using Inputs.GetProperty("strRowID") but where can I find the value of "strRowID".

In another part of the code it says:

SetFieldValue("AV Flag", vReadOnly);

and vReadOnly is declared as

var vReadOnly = Inputs.GetProperty("blnReadOnly");

but nowehere is mentioned which the value of "blnReadOnly" is. The code is part of a Business Service, invoked through an Applet Server Script.