As the sibling answer says, they are not visible. However, crates can re-export symbols they have imported from their dependency, which couples their semver to

As the sibling answer says, they are not visible. However, crates can re-export symbols they have imported from their dependency, which couples their semver to that dependency's in a way that people have often not realized. This has been the source of some upgrade headaches so far, but its less of a problem than it has been with languages in my experience.