https://github.com/facebook/facebook-ios-sdk/blob/9e604fed90f4ad47873e95bbb6655b402afc8af5/FBSDKCoreKit/FBSDKCoreKit/Internal/AppEvents/FBSDKAppEventsUtility.m
facebook-ios-sdk/FBSDKCoreKit/FBSDKCoreKit/Internal/AppEvents/FBSDKAppEventsUtility.m at...
ios sdkfacebookinternal