GUI: demonstrate that blender has recieved results of the request

__init__.py

@@ -10,17 +10,18 @@ class PackageSettings(bpy.types.PropertyGroup):
     url = bpy.props.StringProperty(name="URL")
 
 # class PackageManager:
-    # # For some reason accessing 'settings' PointerProperty via wm.package_manager.settings gives a value error
-    # # but accessing it when not stored in this class (wm.package_manager_settings) is fine?
-    # # settings = bpy.props.PointerProperty(type=PackageSettings)
-    # pipes = []
+#     # For some reason accessing *Property objects stored in this class gives a TypeError:
+#     # UILayout.prop(): error with argument 1, "data" -  Function.data expected a AnyType type, not tuple
+#     # But accessing them when not stored in a class or dict is fine?
+#     settings = bpy.props.PointerProperty(type=PackageSettings)
+#     last_response_code = bpy.props.PointerProperty(type=bpy.types.StringProperty)
 
 def register():
     from . import (pkg_ops, pkg_ui)
 
     bpy.utils.register_class(PackageSettings)
-    # bpy.types.WindowManager.package_manager = PackageManager()
     bpy.types.WindowManager.package_manager_settings = bpy.props.PointerProperty(type=PackageSettings)
+    # bpy.types.WindowManager.pm_last_response_code = bpy.props.StringProperty(name="pm_last_response_code")
     pkg_ops.register()
     pkg_ui.register()
 
@@ -30,5 +31,6 @@ def unregister():
     pkg_ops.unregister()
     pkg_ui.unregister();
     bpy.utils.unregister_class(PackageSettings)
-    del bpy.types.WindowManager.package_manager
+    del bpy.types.WindowManager.package_manager_settings
+    # del bpy.types.WindowManager.pm_last_response_code