== JavaScript side ==
[Function (anonymous)]
3
[Function (anonymous)]
-1
== Python side ==
<class 'JsProxy'>
3
<class 'JsProxy'>
-1
<class 'function'>
6
<class 'function'>
3.0
== JavaScript side ==
[Function: obj] { _ref: 4 }
6
[Function: obj] { _ref: 3 }
3