code: public static AppEventsLogger newLogger(Context context, String applicationId, Session session) {
          return new AppEventsLogger(context, applicationId, session);
      }
docs: Build an AppEventsLogger instance to log events through.
  
  @param context       Used to access the attributionId for non-authenticated users.
  @param applicationId Explicitly specified Facebook applicationId to log events against.  If null, the default
  app ID specified in the package metadata will be used.
  @param session       Explicitly specified Session to log events against.  If null, the activeSession
  will be used if it's open, otherwise the logging will happen against the specified
  app ID.
  @return AppEventsLogger instance to invoke log* methods on.