Folium Choropleth -有没有办法为NaN值添加交叉阴影？

import folium
from branca.colormap import LinearColormap

# 创建地图对象
m = folium.Map()

# 创建颜色映射
colormap = LinearColormap(['green', 'yellow', 'red'], vmin=0, vmax=100)

# 创建Choropleth对象，并指定NaN值的填充颜色为灰色
folium.Choropleth(
    geo_data='path_to_geojson_file',
    data='path_to_data_file',
    columns=['region', 'value'],
    fill_color=colormap,
    fill_opacity=0.7,
    line_opacity=0.2,
    nan_fill_color='gray',  # 指定NaN值的填充颜色
    nan_fill_opacity=0.5,  # 指定NaN值的填充透明度
).add_to(m)

# 显示地图
m

import folium
from branca.colormap import LinearColormap

# 创建地图对象
m = folium.Map()

# 创建颜色映射
colormap = LinearColormap(['green', 'yellow', 'red'], vmin=-1, vmax=100)

# 创建Choropleth对象，并将NaN值替换为-1
folium.Choropleth(
    geo_data='path_to_geojson_file',
    data='path_to_data_file',
    columns=['region', 'value'],
    fill_color=colormap,
    fill_opacity=0.7,
    line_opacity=0.2,
    nan_fill_color='gray',  # 可选，指定NaN值的填充颜色
    nan_fill_opacity=0.5,  # 可选，指定NaN值的填充透明度
).add_to(m)

# 显示地图
m