code: def dynkin_diagram(self):
      diag = "0≡<≡0\n1   2"
      return diag
  
file_path: sympy/sympy/liealgebras/type_g.py
imports: from .cartan_type import Standard_Cartan
  from sympy.core.backend import Matrix
label_desc: Use image node_id 8 for calling the TypeG obj's underlying member method code with example usage: obj.dynkin_diagram() and returns: diag