code: def update(self, name, val):
      if self.use_absl:
          setattr(self.absl_flags.FLAGS, name, val)
      else:
          self.check_exists(name)
          if name not in self.values:
              raise Exception(
                  "Unrecognized config option: {}".format(name)
              )
          self.values[name] = val
  
imports: import os
  import sys
label_desc: Use image node_id 2 for calling the Config obj's underlying member method code with example usage: obj.update(name, val) without return types