Originally created by peace-maker, maintained by myself over the past two years or so - a python script which updates sourcemod provided handles to their respective methodmap through regex.
For instructions, see the readme.
Project Here.
I have another similar script that attempts to update old syntax and formatting, although it requires some work and isn't perfect. My plan is to migrate it to use ANTLR, although it may be a while before I find the time to work on it. If you are interested in seeing the python script, ping me in the sourcemod discord.