code: func SetShhConfig(ctx *cli.Context, stack *node.Node, cfg *whisper.Config) {
  	if ctx.GlobalIsSet(WhisperMaxMessageSizeFlag.Name) {
  		cfg.MaxMessageSize = uint32(ctx.GlobalUint(WhisperMaxMessageSizeFlag.Name))
  	}
  	if ctx.GlobalIsSet(WhisperMinPOWFlag.Name) {
  		cfg.MinimumAcceptedPOW = ctx.GlobalFloat64(WhisperMinPOWFlag.Name)
  	}
  	if ctx.GlobalIsSet(WhisperRestrictConnectionBetweenLightClientsFlag.Name) {
  		cfg.RestrictConnectionBetweenLightClients = true
  	}
  }
docs: // SetShhConfig applies shh-related command line flags to the config.