anchor.diff:    echo "$0 [--privileged] [--consumer-group-prefix prefix] username"
   }
   
  -if (( $# < 1 )) || (( $# > 4 )); then
  +if (( $# < 1 )) || (( $# > 9 )); then
     usage
     exit 1
   fi
   
  +topic_prefixes="swh.journal.objects. swh.journal.indexed."
  +privileged_topic_prefixes="swh.journal.objects_privileged."
  +
   privileged="unprivileged"
   cgrp_prefix=""
  +ops="READ DESCRIBE"
   
   while (( $# )); do
     if [ $1 = "--privileged" ]; then
  
positive.code:   elif [ $1 = "--consumer-group-prefix" ]; then
      cgrp_prefix=$2
      shift
      shift
    else
      username=$1
  
negative.code: 	--entity-type users \
  	--entity-name $username
  
  if [ $privileged = "privileged" ]; then
  	topic_prefixes="${topic_prefixes} ${privileged_topic_prefixes}"
  fi
  
  for topic_prefix in $topic_prefixes; do
  	echo "Granting access to topics $topic_prefix to $username"
  	for op in ${OPS}; do
  		/opt/kafka/bin/kafka-acls.sh --bootstrap-server $brokers --add --resource-pattern-type PREFIXED --topic $topic_prefix --allow-principal User:$username --operation $op
  	done
  done
  