code: public void setExtraDatatypes(List<String> datatypeList) {
  
      getInitializationState().requireNotInitilized();
      for (String fqn : datatypeList) {
        registerCustomDatatype(fqn);
      }
    }
docs: Adds a list of additional datatypes to register. E.g. for easy spring configuration and custom extension.
  
  @param datatypeList is the {@link List} of {@link Class#getName() fully qualified names} of additional
  {@link Datatype}s to {@link #registerCustomDatatype(String) register}.