/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.function.*;
 
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone {
    public static void main(Consumer<String> c) {
        c.accept(c.toString());
    }
    static PrintStream fakeOut = new PrintStream(System.out){
        @Override public void println(String x) {
            super.println("[FakeOut] " + x);
        }
    };
    public static void main(String[] args) {
        Consumer<String> consumerRef = System.out::println;
        Consumer<String> consumer = x -> System.out.println(x);
        main(consumerRef);
        main(consumer);
        System.setOut(fakeOut);
        main(consumerRef);
        main(consumer);
    }
}

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