code: def hide_all_signals(self):
      for signal_name in self.signals.keys():
          self.set_signal_selection(signal_name, False)
  
file_path: coach/rl_coach/dashboard_components/signals_file_base.py
imports: import numpy
  from bokeh.models import ColumnDataSource
  from rl_coach.dashboard_components.signals import Signal
  from rl_coach.dashboard_components.globals import x_axis, x_axis_options, show_spinner
label_desc: Use image node_id 9 for calling the SignalsFileBase obj's underlying member method code with example usage: obj.hide_all_signals() without return types