/** Returns a {@link KV} with the given key and value. */ public static <K, V> KV<K, V> of(@Nullable K key, @Nullable V value) { return new KV<>(key, value); }
/** Returns a {@link KV} with the given key and value. */ public static <K, V> KV<K, V> of(@Nullable K key, @Nullable V value) { return new KV<>(key, value); }