Describes an autoscaling policy for Dataproc cluster autoscaler.
.. attribute:: id
Required. The policy id. The id must contain only letters
(a-z, A-Z), numbers (0-9), underscores (_), and hyphens (-).
Cannot begin or end with underscore or hyphen. Must consist of
between 3 and 50 characters.
Autoscaling algorithm for policy.
Optional. Describes how the autoscaler will operate for
secondary workers.