public Builder clearMinBackoff() {
      bitField0_ = (bitField0_ & ~0x00000008);
      minBackoff_ = null;
      if (minBackoffBuilder_ != null) {
        minBackoffBuilder_.dispose();
        minBackoffBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
A task will be [scheduled][google.cloud.tasks.v2beta2.Task.schedule_time]
for retry between
[min_backoff][google.cloud.tasks.v2beta2.RetryConfig.min_backoff] and
[max_backoff][google.cloud.tasks.v2beta2.RetryConfig.max_backoff] duration
after it fails, if the queue's
[RetryConfig][google.cloud.tasks.v2beta2.RetryConfig] specifies that the
task should be retried.

If unspecified when the queue is created, Cloud Tasks will pick the
default.

This field is output only for [pull
queues][google.cloud.tasks.v2beta2.PullTarget].


`min_backoff` will be truncated to the nearest second.

This field has the same meaning as
[min_backoff_seconds in
queue.yaml/xml](https://cloud.google.com/appengine/docs/standard/python/config/queueref#retry_parameters).
</pre>

<code>.google.protobuf.Duration min_backoff = 4;</code>
java-tasks/proto-google-cloud-tasks-v2beta2/src/main/java/com/google/cloud/tasks/v2beta2/RetryConfig.java