code: def p_property_assignment(self, p):
          
          if len(p) == 4:
              p[0] = ast.Assign(left=p[1], op=p[2], right=p[3])
          elif len(p) == 8:
              p[0] = ast.GetPropAssign(prop_name=p[2], elements=p[6])
          else:
              p[0] = ast.SetPropAssign(
                  prop_name=p[2], parameters=p[4], elements=p[7])
docs: property_assignment \
               : property_name COLON assignment_expr
               | GETPROP property_name LPAREN RPAREN LBRACE function_body RBRACE
               | SETPROP property_name LPAREN formal_parameter_list RPAREN \
                     LBRACE function_body RBRACE