code: def set_color(self, color):
      self.color = color
      if self.line:
          self.line.glyph.line_color = color
      if self.bands:
          self.bands.glyph.fill_color = color
  
file_path: coach/rl_coach/dashboard_components/signals.py
imports: import random
  import numpy
  from bokeh.models import ColumnDataSource
  from bokeh.palettes import Dark2
  from rl_coach.dashboard_components.globals import show_spinner, hide_spinner, current_color
  from rl_coach.utils import squeeze_list
label_desc: Use image node_id 2 for calling the Signal obj's underlying member method code with example usage: obj.set_color(color) without return types