Implementation of 'flashbots_getUserStats' , 'flashbots_getBundleStats' and others

Which Flashbots repository holds the implementations of these methods: 'flashbots_getUserStats' ,'flashbots_getBundleStats', 'flashbots_getUserStatsV2', 'flashbots_getBundleStatsV2' ?
I have searched every repo in Flashbots organisation on Github but came up short. I only see usage of these methods but not the actual definition and implementations. Is this proprietary?