code: private void introspectSerializer(MapSerializer mapSerializer, MapTypeJrapidoc type) {
          try {
              Field keyTypeField = mapSerializer.getClass().getDeclaredField("_keyType");
              keyTypeField.setAccessible(true);
              JavaType keyType = (JavaType) keyTypeField.get(mapSerializer);
              JavaType valueType = mapSerializer.getContentType();
              getType(keyType);
              getType(valueType);
          } catch (NoSuchFieldException e) {
              e.printStackTrace();
          } catch (IllegalAccessException e) {
              e.printStackTrace();
          }
      }
docs: Introspect serializer for map
  
  @param mapSerializer
  @param type