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SRI International's AIC Utility Library (for Java 1.6+)

There is a newer version: 1.3.3

package com.sri.ai.util.base;

import com.google.common.base.Function;

/**
 * A {@link Function} that always returns null.
 * 
 * @author braz
 *
 * @param 
 *            the argument type for the function.
 * @param 
 *            the return type for the function.
 */
public class Null implements Function {

	@Override
	public R apply(A input) {
		return null;
	}
}