Added node check() method for sanity check
Added node check() method for sanity check

oetting/jodd,wsldl123292/jodd,Artemish/jodd,oblac/jodd,southwolf/jodd,mosoft521/jodd,Artemish/jodd,Artemish/jodd,Artemish/jodd,mtakaki/jodd,mtakaki/jodd,mohanaraosv/jodd,wsldl123292/jodd,mtakaki/jodd,oblac/jodd,oetting/jodd,oblac/jodd,tempbottle/jodd,mosoft521/jodd,southwolf/jodd,vilmospapp/jodd,tempbottle/jodd,vilmospapp/jodd,javachengwc/jodd,Artemish/jodd,tempbottle/jodd,oetting/jodd,wsldl123292/jodd,mohanaraosv/jodd,javachengwc/jodd,vilmospapp/jodd,oblac/jodd,wjw465150/jodd,wsldl123292/jodd,vilmospapp/jodd,wjw465150/jodd,vilmospapp/jodd,mohanaraosv/jodd,javachengwc/jodd,wjw465150/jodd,mosoft521/jodd,mtakaki/jodd,southwolf/jodd,tempbottle/jodd,southwolf/jodd,mohanaraosv/jodd,wjw465150/jodd,mosoft521/jodd,javachengwc/jodd,oetting/jodd