This is what worked for me for the benefit of anyone else:
// LOGGING
LoggingOutInterceptor loi = new LoggingOutInterceptor();
loi.setPrettyLogging(true);
LoggingInInterceptor lii = new LoggingInInterceptor();
lii.setPrettyLogging(true);
org.apache.cxf.endpoint.Client client =
org.apache.cxf.frontend.ClientProxy.getClient(isalesService);
org.apache.cxf.endpoint.Endpoint cxfEndpoint = client.getEndpoint();
cxfEndpoint.getOutInterceptors().add(loi);
cxfEndpoint.getInInterceptors().add(lii);
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