code: func (ca *CustomArgs) AddFlags(fs *pflag.FlagSet) {
  	pflag.CommandLine.StringSliceVar(&ca.BoundingDirs, "bounding-dirs", ca.BoundingDirs,
  		"Comma-separated list of import paths which bound the types for which deep-copies will be generated.")
  }
docs: // AddFlags add the generator flags to the flag set.