code: def update(self, dt):
      self.controller.update(dt)
  
file_path: sympy/sympy/plotting/pygletplot/plot_window.py
imports: from time import perf_counter
  import pyglet.gl
  from sympy.plotting.pygletplot.managed_window import ManagedWindow
  from sympy.plotting.pygletplot.plot_camera import PlotCamera
  from sympy.plotting.pygletplot.plot_controller import PlotController
label_desc: Use image node_id 4 for calling the PlotWindow obj's underlying member method code with example usage: obj.update(dt) without return types