Cargo Features

[dependencies]
assert_tv = { version = "0.5.1", default-features = false, features = ["enabled", "tls"] }
default = tls

The tls feature is set by default whenever assert_tv is added without default-features = false somewhere in the dependency tree.

enabled = log, serde_yaml
tls default

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

log enabled?
serde_yaml enabled?