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public final class Some<T> extends Option<T> {
    
    private final T value;
    
    public Some(T value) { this.value = value; }
    
    public boolean hasValue() { return true; }
    
    public T get() { return value; }
    
    @Override
    public String toString() { return "Some("+value+")"; }
    
    @Override
    public boolean equals(Object other) {
        if (other == null || other.getClass() != Some.class)
            return false;
        Some<?> that = (Some<?>) other;
        Object thatValue = that.get();
        return value.equals(thatValue);
    }
    
    @Override
    public int hashCode() { return 37 * value.hashCode(); }
}