Change GeoJSON style_callback post-instantiation?

When I add a GeoJSON layer like this:

m = Map(center=[38.8976, -77.0365], zoom=11)
gj = GeoJSON(data=open("my.geojson").read())
m.add_layer(gj)

I can change its style attribute later and the browser will apply the change:

gj.style = {"color": "red"}  # changes color from default to red

It would be very useful if the same would happen when “changing” the style_callback parameter" dynamically at any time later (and not only when instantiating the object) like this (setting it to a constant value only for illustration):

gj.style_callback = lambda feature: {"color": "green"}

But this has no effect now. I see that style_callback is not listed in gj.keyswhich is likely one part of the reason… I’m trying to understand if this would be possible or not.

[sackh]

@martinRenou - I would like to work on this for JupyterCon sprint. Please assign this to me.

[deeplook]

load_data_style?