Salesforce Apex Chained Queueable with String's rather than ID's

ChainedQueueable.cls

public abstract class ChainedQueueable implements Queueable, Database.AllowsCallouts {

    private Set<String> records;

    public ChainedQueueable(Set<String> records) {
        this.records = records;
    }

    public abstract void processRecord(String record);

    public abstract ChainedQueueable createJob(Set<String> recordSet);

    public void execute(QueueableContext context) {

        if (records.size() == 0) {
            return;
        }

        String record = getNextRecord();

        processRecord(record);

        processNextRecord();
    }

    private void processNextRecord() 
    {
        enqueueJob(this.records);
    }

    private void enqueueJob(Set<String> recordSet) {

        if (recordSet.size() == 0) {
            return;
        }

        // create next job
        ChainedQueueable job = createJob(recordSet);

        // queue next job
        Id jobId = System.enqueueJob(job);

        System.debug(jobId);
    }

    public void enqueueJob() {
        
        // queue job
        Id jobId = System.enqueueJob(this);

        System.debug(jobId);
    }

    private Id getNextRecord() {

        // get next record
        String record;
        for(String item : records) {
            record = item;
            break;
        }

        // remove record
        records.remove(record);

        return record;
    }
}