Features not displayed with style_function

首先，在 Jupyter Notebook 中使用附带的 demo.json 数据，分别运行带有和不带有 style_function 的 issue GeoJSON 复现。跟踪 Folium GeoJson 的样式处理路径，并在 LineString 要素以请求的颜色、线宽、不透明度和 dashArray 完成渲染时验证完成情况。

Describe the bug
When loading a set of GeoJSON LineString features, they are not displayed on the Folium map in my Jupyter Notebook (GColab, as well) when using style_function. If style_function=style_functions is removed from the following code, the features are displayed correctly, even though without styling.

To Reproduce

import folium
import json

# Load the GeoJSON file
with open('demo.json') as f:
    data = json.load(f)

# Create a Folium map centered on a location of your choice
m = folium.Map(location=[37.982759260869564, 23.901986296376812], zoom_start=18)

# Define a style function that changes the color of LineString features
def style_functions(feature):
    color = 'red'  # Change the color to your desired color or use a custom logic
    return {
        'color': 'blue',
        'weight': 3,
        'opacity': 0.7,
        'dashArray': [5, 10]
    }

# Add the GeoJSON data to the map with the style function applied
folium.GeoJson(data, style_function=style_functions).add_to(m)

# Display the map
m

Demo GeoJSON has been attached. Please remove the .txt extension for it to load.
demo.json.txt

Expected behavior

style_function should not hide the features, but display them with the styling specified.

Environment (please complete the following information):

• Browser [e.g. firefox]
• Jupyter Lab & Google Colab
• Python 3.10.12
• folium 0.14.0
• branca 0.6.0

Additional context
In a similar test, PointString features were correctly displayed, with or without the style_function argument.