def send_messages(self, messages):
        mail.outbox.extend(messages)
        return len(messages)
Return single node imput if exists. Convenience property for nodes which process only one
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/_internal/django/core/mail/backends/locmem.py/EmailBackend.send_messages--crossover with--dataset/ETHPy150Open Stiivi/brewery/brewery/nodes/base.py/Node.input