Till the innerclass construction issue

groovy.lang.GroovyRuntimeException: Could not find matching constructor for: com.xlsxstreamer.processor.HeaderAwareXlsxStreamer$HeaderAwareXlsxStreamHandler(com.xlsxstreamer.handler.HeaderAwareRowHandlerTestImpl)
 at com.xlsxstreamer.processor.HeaderAwareXlsxStreamer.initContentHandler(HeaderAwareXlsxStreamer.groovy:36)
 at com.xlsxstreamer.processor.XlsxStreamer.start(XlsxStreamer.groovy:79)
 at com.xlsxstreamer.handler.HeaderAwareSheetProcessorTests.Handle header & data in excel(HeaderAwareSheetProcessorTests.groovy:14)