path: root/src/doc/book/listings/ch19-advanced-features/listing-19-21/output.txt

$ cargo run
   Compiling traits-example v0.1.0 (file:///projects/traits-example)
    Finished dev [unoptimized + debuginfo] target(s) in 0.48s
     Running `target/debug/traits-example`
A baby dog is called a puppy