public com.google.cloud.tasks.v2beta2.Task cancelLease(
        com.google.cloud.tasks.v2beta2.CancelLeaseRequest request) {
      return io.grpc.stub.ClientCalls.blockingUnaryCall(
          getChannel(), getCancelLeaseMethod(), getCallOptions(), request);
    }
<pre>
Cancel a pull task's lease.
The worker can use this method to cancel a task's lease by
setting its [schedule_time][google.cloud.tasks.v2beta2.Task.schedule_time]
to now. This will make the task available to be leased to the next caller
of [LeaseTasks][google.cloud.tasks.v2beta2.CloudTasks.LeaseTasks].
</pre>
java-tasks/grpc-google-cloud-tasks-v2beta2/src/main/java/com/google/cloud/tasks/v2beta2/CloudTasksGrpc.java