prints to terminal the summray statistics

def print(self):
        """
        prints to terminal the summray statistics
        """
        print("TOTALS -------------------------------------------")
        print(json.dumps(self.counts, indent=4, sort_keys=True))
        if self.sub_total:
            print("\nSUB TOTALS --- based on '%s' ---------" % self.sub_total)
            print(json.dumps(self.sub_counts, indent=4, sort_keys=True))
        if self.list_blank:
            print("\nMISSING nodes for '%s':" % self.list_blank,
                  len(self.blank))