@FunctionalInterface
public abstract interface BiFunction<T, U, R>
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Represents a function that accepts two arguments and produces a result. This is the two-arity specialization of Function.

This is a functional interface whose functional method is apply(Object, Object).

Parameters:
<T>    the type of the first argument to the function
<U>    the type of the second argument to the function
<R>    the type of the result of the function

See also:
Function

Since:  1.8