Function apply_plan 

pub fn apply_plan<R: Reporter>(
    plan: &SyncPlan,
    src: &Path,
    dst: &Path,
    opts: ApplyOptions,
    reporter: &R,
) -> Result<Stats>

Apply plan, mirroring src into dst.

Returns the Stats tally. Per-entry failures are reported via reporter and counted in Stats::errors; only setup-level problems (e.g. a containment violation establishing the root) abort the whole run.

Errors

Returns an error if the destination root cannot be created/canonicalized, or a relative path fails its safety check.