https://github.com/JakeWharton/butterknife/commit/ec778ad8cbb21b68828153c0a4dbfc6b39319ced#diff-04c6e90faac2675aa89e2176d2eec7d8 https://github.com/JakeWharton/butterknife/pull/243 たまたまREADME見てて、あれ？この書き方動かないんじゃないか…