### Question:
SDNCAdapterCallbackRequest { @Override public String toString() { try { JAXBContext ctx = JAXBContext.newInstance("org.onap.so.adapters.sdnc.client"); Marshaller m = ctx.createMarshaller(); m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); m.setProperty(Marshaller.JAXB_ENCODING, "UTF-8"); StringWriter w = new StringWriter(); m.marshal(this, w); return w.toString(); } catch (Exception e) { logger.error(LoggingAnchor.THREE, MessageEnum.RA_MARSHING_ERROR.toString(), ErrorCode.DataError.getValue(), "Exception - MARSHING_ERROR", e); } return ""; }  CallbackHeader getCallbackHeader(); void setCallbackHeader(CallbackHeader value); Object getRequestData(); void setRequestData(Object value); @Override String toString();  }### Answer:
@Test public void testtoString() { assertNotNull(ch.toString()); assertNotNull(sdc.toString()); }