code: public <T> void registerCustomSerializer( Class<T> cls, JsonSerializer<T> forType )
    {
        this.converter.registerCustomSerializer( cls, forType );
    }
docs: Registering custom serializer allows to the JSonView to deal with custom serializations for certains field types.<br>
  This way you could register for instance a JODA serialization as  a DateTimeSerializer. <br>
  Thus, when JSonView find a field of that type (DateTime), it will delegate the serialization to the serializer specified.<br>
  Example:<br>
  <code>
  JsonViewSupportFactoryBean bean = new JsonViewSupportFactoryBean( mapper );
  bean.registerCustomSerializer( DateTime.class, new DateTimeSerializer() );
  </code>
  @param <T> Type class of the serializer
  @param cls {@link Class} the class type you want to add a custom serializer
  @param forType {@link JsonSerializer} the serializer you want to apply for that type