@Nullable
    public T get() {
        if (!isPresent()) {
            throw new NoSuchElementException("No value present");
        }
        return this.value;
    }
If a value is present in this {@code NullableOptional}, returns the value,
otherwise throws {@code NoSuchElementException}.

@return the value held by this {@code NullableOptional}
@throws NoSuchElementException if there is no value present

@see NullableOptional#isPresent()
helper/src/main/java/me/lucko/helper/utils/NullableOptional.java