docs: public void printToStandardStream() throws FileNotFoundException {
          System.out.println("I'm gonna print to the command line"); // Violates rule not to write to standard streams
          System.err.println("I'm gonna print to the command line"); // Violates rule not to write to standard streams
          new SomeCustomException().printStackTrace(); // Violates rule not to write to standard streams
  
          new SomeCustomException().printStackTrace(new PrintStream("/some/file")); // this is okay, since it's a custom PrintStream
          new SomeCustomException().printStackTrace(new PrintWriter("/some/file")); // this is okay, since it's a custom PrintWriter
      }