code: func (st *stateTracker) Wipe() {
  	st.mu.Lock()
  	defer st.mu.Unlock()
  	// Deleting all the channels implicitly deletes every nick but me.
  	for _, ch := range st.chans {
  		st.delChannel(ch)
  	}
  }
docs: // ... and a method to wipe the state clean.