public static final class Opt.Empty<T> extends Object implements Opt<T>
The class is immutable and thread-safe.
Opt.Empty<T>, Opt.Single<T>
Opt.Empty()
T
get()
boolean
has()
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
public Opt.Empty()
public T get()
Opt
get
Opt<T>
public boolean has()
has
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