[1] [CITE@en[define missing observe() section]] ([[igrigorik]]著, [TIME[2017-12-09 04:58:57 +09:00]]) <https://github.com/w3c/performance-timeline/commit/a61e274e1624ff146b18d52975025a8a1e44e2e2>

[2] [CITE@en[move ObserverInit/ObserverEntryList under observe()]] ([[igrigorik]]著, [TIME[2017-12-09 05:04:36 +09:00]]) <https://github.com/w3c/performance-timeline/commit/43cf7a3255e82a01bcd9df04ada845616407db30>