<T> T compute(DataMap.DataKey<? extends K,T> key, Function<? super @Nullable T,? extends T> function)
Create or replace a mapping with a value computed from the current value (or null if missing).
<T> T computeIfAbsent(DataMap.DataKey<? extends K,T> key, Supplier<? extends T> supplier)
Retrieve the value, or compute it if it is missing.
<T> @Nullable T get(DataMap.DataKey<? extends K,? extends T> key)
Retrieves the data currently mapped to the key.
<T> T getOrDefault(DataMap.DataKey<? extends K,? extends T> key, T defaultValue) boolean isSet(DataMap.DataKey<? extends K,?> key)
Returns true if the given key has a non-null value in the map.
static <K> DataMap<K> newDataMap() <T> @Nullable T set(DataMap.DataKey<? extends K,? super T> key, T data)
Set the mapping to the given data.
static <T> DataMap.SimpleDataKey<T> simpleDataKey(String name)
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