@Deprecated
    @Nullable
    @Contract(value = "null -> null; !null -> !null", pure = true)
    public static <T, U, R> BiFunction<T, U, R> wrap(@Nullable BiFunction<T, U, R> fn) {
        return wrapBiFunction(fn);
    }
wrap {@link BiFunction} to TTL wrapper.

@param fn input {@link BiFunction}
@return Wrapped {@link BiFunction}
@see TtlUnwrap#unwrap(Object)
@since 2.11.4
@deprecated overload methods using the same name {@code wrap} is not readable
and have the type inference problems in some case;
so use {@link TtlWrappers#wrapBiFunction(BiFunction)} instead.
ttl2-compatible/src/main/java/com/alibaba/ttl/TtlWrappers.java