public String getComponentDisplay(String service, String component) {
    String key = service + ":" + component;
    if (m_componentNames.containsKey(key)) {
      return m_componentNames.get(key);
    }

    return component;
  }
@return the component display name, or the component name if not set
ambari-server/src/main/java/org/apache/ambari/server/stack/upgrade/orchestrate/UpgradeContext.java