isReservedTag: (x?: string) => boolean;
isReservedAttr: (x?: string) =>布尔值；
parsePlatformTagName: (x: string) =>字符串;
isUnknownElement: (x?: string) => boolean;
getTagNamespace: (x?: string) =>字符串| void;
MustUseProp: (标签: string, 类型: ?string, 名称: string) =>布尔值；
flow 的类型系统
见这个回答/q/10...