Customizing legends in `vba_choropleth`

[LSYS]

Hi, is it possible to customize the legend's axis labels in splot's vba_choropleth?
(I'm referring to this guide: https://nbviewer.org/github/pysal/splot/blob/main/notebooks/mapping_vba.ipynb)

from libpysal import examples
import matplotlib.pyplot as plt
from splot.mapping import vba_choropleth
import geopandas as gpd

link_to_data = examples.get_path('columbus.shp')
gdf = gpd.read_file(link_to_data)

fig = plt.figure(figsize=(15,10))
ax = fig.add_subplot(111)
vba_choropleth('HOVAL', 'CRIME', gdf,
               alpha_mapclassify=dict(classifier='quantiles', k=5),
               rgb_mapclassify=dict(classifier='quantiles', k=5),
               legend=True, ax=ax)
plt.show()

For example, is it possible to change "alpha variable" to "HOVAL" and "rgb variable" to "crime"?