@Override
  public Collection<String> getCreateDirectives() {
    return Sets.newHashSet(Request.DIRECTIVE_DRY_RUN,
        VersionDefinitionResourceProvider.DIRECTIVE_SKIP_URL_CHECK);
  }
The Resource Definition used for Version Definition files.
ambari-server/src/main/java/org/apache/ambari/server/api/resources/VersionDefinitionResourceDefinition.java