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fix doc
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@ -246,12 +246,14 @@ public class Opt<T> {
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* 如果包裹里元素的值存在,就执行对应的操作,并返回本身
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* 如果不存在,返回一个空的{@code Opt}
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*
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* <p>属于 {@link #ifPresent}的链式拓展
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*
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* @param action 值存在时执行的操作
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* @return this
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* @throws NullPointerException 如果值存在,并且传入的操作为 {@code null}
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* @apiNote 属于 {@link #ifPresent}的链式拓展
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* @author VampireAchao
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*/
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public Opt<T> peek(Consumer<T> action) {
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public Opt<T> peek(Consumer<T> action) throws NullPointerException {
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Objects.requireNonNull(action);
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if (isEmpty()) {
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return Opt.empty();
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