code: public static Schema schema(int version, Class<? extends Iced> impl_class) {
      if (version == -1) version = getLatestVersion();
      return schema(version, impl_class.getSimpleName());
    }
docs: For a given version and Iced class return an appropriate Schema instance, if any.
  @param version Version of the schema to create, or pass -1 to use the latest version.
  @param impl_class Create schema corresponds to this implementation class.
  @throws H2OIllegalArgumentException if Class.newInstance() throws
  @see #schema(int, java.lang.String)
  @deprecated