docs: private static void parseStencil(JSONObject modelJSON,
                                       Shape current) throws JSONException {
          // get stencil type
          if (modelJSON.has("stencil")) {
              JSONObject stencil = modelJSON.getJSONObject("stencil");
              // TODO other attributes of stencil
              String stencilString = "";
              if (stencil.has("id")) {
                  stencilString = stencil.getString("id");
              }
              current.setStencil(new StencilType(stencilString));
          }
      }