code: def test_geojson_empty_features_with_styling():
      # test we don't fail style function validation when there are no features
      m = Map()
      data = {"type": "FeatureCollection", "features": []}
      GeoJson(data, style_function=lambda x: {}).add_to(m)
      m.get_root().render()
  
imports: import json
  import os
  import warnings
  import pytest
  from branca.element import Element
  import folium
  from folium import Choropleth, ClickForMarker, GeoJson, Map, Popup
label_desc: Use image node_id 14 for calling a global function with example usage: test_geojson_empty_features_with_styling() without return types