code: protected String getApiId(String orgId, String apiId, String version) {
          return ESUtils.escape(orgId + ":" + apiId + ":" + version); //$NON-NLS-1$ //$NON-NLS-2$
      }
docs: Generates a valid document ID for a api, used to index the api in ES.
  @param orgId
  @param apiId
  @param version
  @return a api id