ipyvuetify can't set prop to static text - jupyter-notebook

Question

Hello nice people of Internet ;)
New job, new language. I need to modify Ipyvuetify Vue code in Jupiter notebooks to use static props.
I was able to throw together simple vue example
where I am able to set prop of child component via assigned static text in declarative way in vue file.
And it works just fine in js variant. https://jsfiddle.net/wu9bxL1n/1/
But the same approach doesn't seem to work at all in ipyvuetify syntax. No error no nothing. Static string assigned to child prop is just being silently ignored and I can't seem to find anything in docs as for why. What did I missed ?
Here is the smallest possible code in ipyvuetify syntax copy/pastable to Jupiter notebook.
import ipyvuetify as v
import traitlets
​
class AA(v.VuetifyTemplate):
template = traitlets.Unicode('''
<template>
<v-card-title>{{label}}</v-card-title>
</template>
<script> export default { name: "aa", props: ['label'] } </script>''').tag(sync=True)
label = traitlets.Unicode('But this is showing default text instead').tag(sync=True)
​
class BB(v.VuetifyTemplate):
template = traitlets.Unicode('''
<template>
<div>
<v-text-field label="This text was set statically" ></v-text-field>
<aa label="This text was set statically"></aa>
</div>
</template>''').tag(sync=True)
components = traitlets.Dict(default_value={'aa': AA()}).tag(sync=True, **v.VuetifyTemplate.class_component_serialization)
​
BB()
​---
Output:
This text was set statically
But this is showing default text instead

Answer 1

O boy.
Answer was some undocumented behavior seen in some 3rd party lib source code.
we need to use
default_value={'aa': AA }
instead of
default_value={'aa': AA()}
then setting static props to your own components will work.
Weird I know.
Hopefully people solving the some problem will find this.
Take care guys ;)