code: public static <T> boolean map(Class<? super T> baseClass, Class<T> typeClass)
      {
          if (ID_STRATEGY instanceof DefaultIdStrategy)
              return ((DefaultIdStrategy) ID_STRATEGY).map(baseClass, typeClass);
  
          throw new RuntimeException(
                  "RuntimeSchema.map is only supported on DefaultIdStrategy");
      }
docs: Maps the {@code baseClass} to a specific non-interface/non-abstract {@code typeClass} and registers it (this must
  be done on application startup).
  <p>
  With this approach, there is no overhead of writing the type metadata if a {@code baseClass} field is serialized.
  <p>
  Returns true if the baseClass does not exist.
  <p>
  NOTE: This is only supported when {@link RuntimeEnv#ID_STRATEGY} is {@link DefaultIdStrategy}.
  
  @throws IllegalArgumentException
  if the {@code typeClass} is an interface or an abstract class.