Toggle or Show parameter for choropleth layers not working as expected

#### Please add a code sample or a nbviewer link, copy-pastable if possible

m.choropleth(name = 'Registered Electric Vehicles',geo_data = zips, data = zips, key_on='feature.properties.ZIP',
                     columns=['ZIP','EV'], fill_color='BuGn', line_weight = 0.3, line_opacity = 0.5,
                     fill_opacity = 0.5, legend_name = 'Registered Electric Vehicles', 
                     smooth_factor = 1, toggle = True)

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-54-828389e26172> in <module>()
     11                      columns=['ZIP','PHEV'], fill_color='RdPu', line_weight = 0.3, line_opacity = 0.5,
     12                      fill_opacity = 0.5, legend_name = 'Registered Plug-in Hybrids',
---> 13                      smooth_factor = 1, toggle = True)
     14 m.choropleth(name = 'Registered Electric Vehicles',geo_data = zips, data = zips, key_on='feature.properties.ZIP',
     15                      columns=['ZIP','EV'], fill_color='BuGn', line_weight = 0.3, line_opacity = 0.5,

TypeError: choropleth() got an unexpected keyword argument 'toggle'

Problem description

I have a map with multiple choropleth layers that I want available to select in LayerControl, but I only want one to display on load.

Based on #772 and #606 it seems like anything inheriting the Layer class should have the parameter toggle to enable or disable the layer on load. This doesn’t work for choropleths, which I had thought inherited the Layer class. I’ve also tried adding the choropleth to a FeatureGroup with show = False, but this doesn’t work because choropleth is a method of a Map object.

What am I doing wrong? or is there not currently a way to only display one choropleth layer on load?

Output of folium.__version__

0.6.0

[skoeb]

Thanks @conengmo! This is a great improvement and lets me delete a lot of spaghetti.

[Conengmo]

choropleths are now made by using the Choropleth class, which has a show argument. See also the example notebook on geojson and choropleths.