code: def file_was_modified_on_disk(self):
      return self.last_modified != os.path.getmtime(self.full_csv_path)
  
file_path: coach/rl_coach/dashboard_components/signals_file.py
imports: import os
  from os.path import basename
  import pandas
  from pandas.errors import EmptyDataError
  from rl_coach.dashboard_components.signals_file_base import SignalsFileBase
  from rl_coach.dashboard_components.globals import x_axis_options
  from rl_coach.utils import break_file_path
label_desc: Use image node_id 3 for calling the SignalsFile obj's underlying member method code with example usage: obj.file_was_modified_on_disk() and returns: unknown