docs: public String getSchemaLocation(String version, String schemaLocation)
      {
          if (schemaLocation != null)
              if ((schemaLocation.startsWith("http")) || (schemaLocation.startsWith("/")))
                  return schemaLocation;
          MessageVersion recMessageVersion = this.getMessageVersion(version);
          return this.getSchemaLocation(recMessageVersion, schemaLocation);
      }