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Pure Java implementation of libzmq

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package zmq.util.function;

/**
 * Represents a function that accepts two arguments and produces a result.
 * This is the two-arity specialization of {@link Function}.
 *
 * This is a functional interface
 * whose functional method is {@link #apply(Object, Object)}.
 *
 * @param  the type of the first argument to the function
 * @param  the type of the second argument to the function
 * @param  the type of the result of the function
 *
 * @see Function
 */
public interface BiFunction
{
    /**
     * Applies this function to the given arguments.
     *
     * @param t the first function argument
     * @param u the second function argument
     * @return the function result
     */
    R apply(T t, U u);
}