public List<AlertDefinition> getServerDefinitions() {
    if (null != m_serverDefinitions) {
      return m_serverDefinitions;
    }

    m_serverDefinitions = getDefinitions(RootComponent.AMBARI_SERVER);
    return m_serverDefinitions;
  }
Gets all of the {@link AlertDefinition}s that exist on the path for
{@link RootComponent#AMBARI_SERVER}.

@return the alerts with {@link RootComponent#AMBARI_SERVER} as the component
        and {@code AMBARI} as the service.
ambari-server/src/main/java/org/apache/ambari/server/metadata/AmbariServiceAlertDefinitions.java