private String getListenerEntry(AsyncEventQueueDetails entry) {
    return entry.getListener() + propertiesToString(entry.getListenerProperties());
  }
@return The class of the entry's listener. If the listener is parameterized, these parameters
        are appended in a json format.
geode-gfsh/src/main/java/org/apache/geode/management/internal/cli/commands/ListAsyncEventQueuesCommand.java