code: def gen_inst_var_indx(inst_var, class_key):
      inst_var_name = inst_var["var_name"]
      inst_var_key = join([class_key, inst_var_name], ".")
      return join(
          [
              brackets(bold(inst_var_name)),
              parentheses(inst_var_key),
              " ",
              sub(italic("Instance variable")),
          ]
      )
  
imports: import os
  import yaml
  import re
  import doc_gen_snipets
label_desc: Use image node_id 21 for calling a global function with example usage: gen_inst_var_indx(inst_var, class_key) and returns: join