code: def close(self):
      pass
  
file_path: sympy/sympy/plotting/backends/textbackend/text.py
imports: import sympy.plotting.backends.base_backend
  from sympy.plotting.series import LineOver1DRangeSeries
  from sympy.plotting.textplot import textplot
label_desc: Use image node_id 3 for calling the TextBackend obj's underlying member method code with example usage: obj.close() without return types