def key
import ezx@1.11.0.0/src/fetch/plan.bend as Planimport Base
import ezx@1.11.0.0/src/pkg/path.bend as Path
131# where a path of the lock is in a tree: under its root inside a checkout,
132# and as it is in a tree a manifest names
133def key(+root: String, +at: String) -> String:
134 Bool.pick(String, String.is_empty(root), at, Path.join(root, at))