code: def SystemSymbolizerFactory(system, addr, binary):
      if system == "Darwin":
          return DarwinSymbolizer(addr, binary)
      elif system == "Linux":
          return Addr2LineSymbolizer(binary)
  
imports: import bisect
  import os
  import re
  import subprocess
  import sys
label_desc: Use image node_id 4 for calling a global function with example usage: SystemSymbolizerFactory(system, addr, binary) and returns: DarwinSymbolizer, Addr2LineSymbolizer