blender-python-stubs/overrides/5.0/bpy.msgbus.json

{
  "subscribe_rna": {
    "params": {
      "key": "bpy.types.Property | bpy.types.Struct | tuple[bpy.types.Struct, str] | object"
    }
  },
  "publish_rna": {
    "params": {
      "key": "bpy.types.Property | bpy.types.Struct | tuple[bpy.types.Struct, str] | object"
    }
  }
}