message handler
message passing
https://source.unsplash.com/featured/?message-handler#.png
/suto3/google.iconmessage handler
/suto3/Google画像検索.iconmessage handler
/suto3/Google定義検索.icon message handler
/suto3/wikipedia.iconmessage handler
/suto3/weblio.icon message handler
/suto3/kotobank.icon message handler
/suto3/jisho.icon message handler