code: def prepare_jinja2_environment(env, datasette):
      """Modify Jinja2 template environment e.g. register custom template tags"""
  
imports: from pluggy import HookimplMarker
  from pluggy import HookspecMarker
label_desc: Use image node_id 5 for calling a global function with example usage: prepare_jinja2_environment(env, datasette) without return types