Function record_ledger_slice 

pub fn record_ledger_slice<R>(
    cx: &mut Cx,
    metadata: StreamMetadata,
    ledger: &EventLedger,
    run: &Ref,
    seq_range: R,
) -> Result<StreamRecording>
where
    R: RangeBounds<u64>,

Reconstructs a recording from the events of run within seq_range.

Like record_ledger_run but limited to events whose sequence number falls inside seq_range.