default ListConsumerGroupsResult listConsumerGroups() {
        return listConsumerGroups(new ListConsumerGroupsOptions());
    }
List the consumer groups available in the cluster with the default options.
<p>
This is a convenience method for {@link #listConsumerGroups(ListConsumerGroupsOptions)} with default options.
See the overload for more details.

@return The ListConsumerGroupsResult.
clients/src/main/java/org/apache/kafka/clients/admin/Admin.java