Exception in thread "main" java.lang.AbstractMethodError: io.konik.carriage.itext.ITextInvoiceAppender.getPriority()I
at io.konik.csv.pdf.FileAppenderPriorityComparator.compare(FileAppenderPriorityComparator.java:49)
at io.konik.csv.pdf.FileAppenderPriorityComparator.compare(FileAppenderPriorityComparator.java:15)
at java.util.TimSort.countRunAndMakeAscending(TimSort.java:355)
at java.util.TimSort.sort(TimSort.java:220)
at java.util.Arrays.sort(Arrays.java:1512)
at java.util.ArrayList.sort(ArrayList.java:1454)
at java.util.Collections.sort(Collections.java:175)
at io.konik.PdfHandler.<init>(PdfHandler.java:81)
at io.konik.examples.MinimalInvoice.appendInvoiceToPdf(MinimalInvoice.java:179)
at io.konik.examples.MinimalInvoice.main(MinimalInvoice.java:80)