code: private void introspectSerializer(BeanSerializerBase beanSerializer, CustomType type) {
          try {
              Field propsField = beanSerializer.getClass().getSuperclass().getDeclaredField("_props");
              propsField.setAccessible(true);
              BeanPropertyWriter[] props = (BeanPropertyWriter[]) propsField.get(beanSerializer);
              for (BeanPropertyWriter prop : props) {
                  JavaType propType = prop.getType();
                  getType(propType);
                  String signature = JacksonSignature.createSignature(propType);
                  type.addBeanProperty(new BeanProperty(prop.getName(), signature, prop.getPropertyType(), prop.getMetadata().getDescription(), prop
                          .getMetadata().isRequired()));
              }
          } catch (NoSuchFieldException e) {
              e.printStackTrace();
          } catch (IllegalAccessException e) {
              e.printStackTrace();
          }
      }
docs: Introspect serializer for java beans
  
  @param beanSerializer
  @param type