Fake metadata

Author: hbcarlos

packages/blockly/src/factory.ts

@@ -46,6 +46,9 @@ export class BlocklyEditorFactory extends ABCWidgetFactory<
   protected createNewWidget(
     context: DocumentRegistry.IContext<DocumentModel>
   ): BlocklyEditor {
+    // Set a map to the model. The widgets manager expects a Notebook model
+    // but the only notebook property it uses is the metadata.
+    context.model['metadata'] = new Map();
     const manager = new BlocklyManager(
       this._registry,
       context.sessionContext,

pyproject.toml

@@ -23,8 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
 ]
 dependencies = [
-	"jupyterlab~=3.6",
-    "jupyterlab_widgets~=3.0"
+	"jupyterlab~=3.6"
 ]
 dynamic = ["version", "description", "authors", "urls", "keywords"]