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Only the Java Core part of Javolution library, with slight modifications for use in MSFTBX.

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/*
 * Javolution - Java(TM) Solution for Real-Time and Embedded Systems
 * Copyright (C) 2012 - Javolution (http://javolution.org/)
 * All rights reserved.
 * 
 * Permission to use, copy, modify, and distribute this software is
 * freely granted, provided that this notice is preserved.
 */
package javolution.util.function;

/**
 *  A function which does not take any argument and returns instances
 *      of a particular class.
 *                  
 *  Note: In future version this interface may derive from 
 *           {@code Function}.
 *           
 * @param  The type of result this supplier returns.
 * 
 * @author  Jean-Marie Dautelle
 * @version 6.0, July 21, 2013
 */
public interface Supplier {

    /**
     * Returns an object.
     */
    T get();

}