@Nullable
  @Experimental(feature = ExperimentalFeature.CUSTOM_SERVICE_REPOS,
    comment = "Remove logic for handling custom service repos after enabling multi-mpack cluster deployment")
  public RepositoryXml getRepoFile() {
    return repoFile;
  }
Obtain the repository xml file if exists or null

@return the repository xml file if exists or null
ambari-server/src/main/java/org/apache/ambari/server/stack/StackServiceDirectory.java