@0,1,2,3⦊fn unused_private_function() { let is_true = std::env::args().len() == 1; let mut countdown = 2; if !is_true⦉@0,1,2,3 @4⦊{ countdown = 20; }⦉@4@5⦊⦉@5 }@6⦊⦉@6