module RuboCop::Cop::AllowedReceivers

def receiver_name(receiver)
  if receiver.receiver && !receiver.receiver.const_type?
    return receiver_name(receiver.receiver)
  end
  if receiver.send_type?
    if receiver.receiver
      "#{receiver_name(receiver.receiver)}.#{receiver.method_name}"
    else
      receiver.method_name.to_s
    end
  else
    receiver.source
  end
end