parameters: (self, module_name, flag)
docstring: Specifies that a flag is a key flag for a module.
  
      Args:
        module_name: A string, the name of a Python module.
        flag: A Flag object, a flag that is key to the module.
docstring_summary: Specifies that a flag is a key flag for a module.
docstring_tokens: Specifies that a flag is a key flag for a module .
function: def _RegisterKeyFlagForModule(self, module_name, flag):
      """Specifies that a flag is a key flag for a module.
  
      Args:
        module_name: A string, the name of a Python module.
        flag: A Flag object, a flag that is key to the module.
      """
      key_flags_by_module = self.KeyFlagsByModuleDict()
      # The list of key flags for the module named module_name.
      key_flags = key_flags_by_module.setdefault(module_name, [])
      # Add flag, but avoid duplicates.
      if flag not in key_flags:
        key_flags.append(flag)
function_tokens: def _RegisterKeyFlagForModule ( self , module_name , flag ) : key_flags_by_module = self . KeyFlagsByModuleDict ( ) # The list of key flags for the module named module_name. key_flags = key_flags_by_module . setdefault ( module_name , [ ] ) # Add flag, but avoid duplicates. if flag not in key_flags : key_flags . append ( flag )