全棧然叔Webpack優(yōu)化實戰(zhàn)
private String preface;
? ? ? ?private String head;
? ? ? ?private String content;
? ? ? ?private String thanks;
? ? ? ?private BookBuilder() {
? ? ? ?}
? ? ? ?public static BookBuilder aBook() {
? ? ? ? ? ?return new BookBuilder();
? ? ? ?}
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