Function verify 

pub fn verify<R: Reporter>(
    plan: &SyncPlan,
    src: &Path,
    dst: &Path,
    mode: VerifyMode,
    metadata: MetadataOptions,
    threads: usize,
    control: &RunControl,
    reporter: &R,
) -> Result<VerificationSummary>

Verify a completed apply before manifest persistence.

Errors

Returns an I/O, containment, metadata, or cancellation error.