code: def test_plot_integral():
      # Make sure it doesn't treat x as an independent variable
      from sympy.plotting.pygletplot import PygletPlot
      from sympy.integrals.integrals import Integral
  
      p = PygletPlot(
          Integral(z * x, (x, 1, z), (z, 1, y)), visible=False
      )
      p.wait_for_calculations()
  
file_path: sympy/sympy/plotting/pygletplot/tests/test_plotting.py
imports: from sympy.external.importtools import import_module
  from sympy.core.symbol import symbols
  from sympy.functions.elementary.exponential import log
  from sympy.functions.elementary.trigonometric import cos, sin
label_desc: Use image node_id 11 for calling a global function with example usage: test_plot_integral() without return types