How to find out the identifier of a parameter and modules in Bitrix?

Question

1C-Bitrix

Good afternoon!
Tell me how to find out the parameters of modules in Bitrix,
For example COption::GetOptionString("main", " new_user_registration_def_group ", "2");
How to find out all module parameter identifiers - main.
This new_user_registration_def_group and mail_from, and some others are in the documentation, but they are found in the classes of certain modules, or maybe there is a list of all parameters and which ones belong to which module, something like a typographic guide?

Answer 1

Look in the b_option table, all module parameters are stored there.