isReservedTag: (x?: 文字列) => boolean;
isReservedAttr: (x?: string) => boolean;
parsePlatformTagName: (x: 文字列) => string;
isUnknownElement: (x?: string) => boolean;
getTagNamespace: (x?: string) =>文字列 | void;
mustUseProp: (タグ: 文字列、タイプ: ?文字列、名前: 文字列) =>ブール値;