Cargo Features

borrowing_exerci has no features set by default.

[dependencies]
borrowing_exerci = { version = "0.4.51", features = ["err_02", "err_08", "err_11"] }
ok cp okay okey err err_01 err_02
err_03 err_04 err_05 err_06 err_07 err_08
err_09 err_10 err_11

borrowing_exerci has 3 features without comments.