public final ListSubscriptionsPagedResponse listSubscriptions(ListSubscriptionsRequest request) {
    return listSubscriptionsPagedCallable().call(request);
  }
Lists Google Workspace subscriptions. To learn how to use this method, see [List Google
Workspace
subscriptions](https://developers.google.com/workspace/events/guides/list-subscriptions).

<p>Sample code:

<pre>{@code
// This snippet has been automatically generated and should be regarded as a code template only.
// It will require modifications to work:
// - It may require correct/in-range values for request initialization.
// - It may require specifying regional endpoints when creating the service client as shown in
// https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
try (SubscriptionsServiceClient subscriptionsServiceClient =
    SubscriptionsServiceClient.create()) {
  ListSubscriptionsRequest request =
      ListSubscriptionsRequest.newBuilder()
          .setPageSize(883849137)
          .setPageToken("pageToken873572522")
          .setFilter("filter-1274492040")
          .build();
  for (Subscription element :
      subscriptionsServiceClient.listSubscriptions(request).iterateAll()) {
    // doThingsWith(element);
  }
}
}</pre>

@param request The request object containing all of the parameters for the API call.
@throws com.google.api.gax.rpc.ApiException if the remote call fails
java-workspaceevents/google-cloud-workspaceevents/src/main/java/com/google/apps/events/subscriptions/v1/SubscriptionsServiceClient.java