code: def enable():
      mon.use_tool_id(mon.COVERAGE_ID, "regrtest coverage")
      mon.register_callback(mon.COVERAGE_ID, mon.events.LINE, add_line)
      mon.set_events(mon.COVERAGE_ID, mon.events.LINE)
  
label_desc: Use image node_id 2 for calling a global function with example usage: enable() without return types