code: def add_fkey_act(s, loc, tok):
      return '  "{tableName}":{keyName} -> "{fkTable}":{fkCol}'.format(
          **tok
      )
  
file_path: auptimizer/docs/Database/sql_graphviz.py
imports: import sys
  from datetime import datetime
  from pyparsing import alphas, alphanums, Literal, Word, Forward, OneOrMore, ZeroOrMore, CharsNotIn, Suppress, QuotedString, Optional
label_desc: Use image node_id 4 for calling a global function with example usage: add_fkey_act(s, loc, tok) and returns: str