public String getStreamEntityPath(String systemName, String streamName) {
    LOG.info("Obtaining entity-path for system: {} physical name: {}", systemName, streamName);
    return validateRequiredConfig(getFromStreamIdOrName(CONFIG_STREAM_ENTITYPATH, streamName),
            "EntityPath", systemName, streamName);
  }
Get the Event Hubs entity path (topic name) for the stream

@param systemName name of the system
@param streamName name of stream (physical or streamId)
@return Event Hubs entity path
samza-azure/src/main/java/org/apache/samza/system/eventhub/EventHubConfig.java