Function libpijul::pristine::changeid_log

pub fn changeid_log<'db, 'txn: 'db, T: ChannelTxnT>(
    txn: &'txn T, 
    channel: &'db T::Channel, 
    from: L64
) -> Result<Cursor<T, &'txn T, T::RevchangesetCursor, L64, Pair<ChangeId, SerializedMerkle>>, TxnErr<T::GraphError>>