There is a command group 'az_acr_cache'. This group of commands could 'manage cache rules in azure container registries'. The group of commands has global parameter '--debug' which means 'Increase logging verbosity to show all debug logs.'. The group of commands has global parameter '--help -h' which means 'Show this help message and exit.'. The group of commands has global parameter '--only-show-errors' which means 'Only show errors, suppressing warnings.'. The group of commands has global parameter '--output -o' which means 'Output format.'. The group of commands has global parameter '--query' which means 'JMESPath query string. See <a href="http://jmespath.org/">http://jmespath.org/</a> for more information and examples.'. The group of commands has global parameter '--subscription' which means 'Name or ID of subscription. You can configure the default subscription using `az account set -s NAME_OR_ID`.'. The group of commands has global parameter '--verbose' which means 'Increase logging verbosity. Use --debug for full debug logs.'. This group contains a child command 'az_acr_cache_update'.The syntax is: az acr cache update --name
                    --registry
                    [--add]
                    [--cred-set]
                    [--force-string]
                    [--remove]
                    [--remove-cred-set]
                    [--resource-group]
                    [--set]. The 1th example of the child command would be to use it to 'change or add a credential set to an existing cache rule', the syntax is: az acr cache update -r myregistry -n MyRule -c NewCredSet. The 2th example of the child command would be to use it to 'remove a credential set from an existing cache rule', the syntax is: az acr cache update -r myregistry -n MyRule --remove-cred-set. The parameter '--name -n' is required. It is used to the name of the cache rule.. The parameter '--registry -r' is required. It is used to the name of the container registry. it should be specified in lower case. you can configure the default registry name using `az configure --defaults acr=<registry name>`.. The parameter '--add' is optional. add an object to a list of objects by specifying a path and key value pairs.  example: `--add property.listproperty <key=value, string or json string>`.. The parameter '--cred-set -c' is optional. the name of the credential set.. The parameter '--force-string' is optional. when using 'set' or 'add', preserve string literals instead of attempting to convert to json.. The parameter '--remove' is optional. remove a property or an element from a list.  example: `--remove property.list <indextoremove>` or `--remove propertytoremove`.. The parameter '--remove-cred-set' is optional. optional boolean indicating whether to remove the credential set from the cache rule. false by default.. The parameter '--resource-group -g' is optional. name of resource group. you can configure the default group using `az configure --defaults group=<name>`.. The parameter '--set' is optional. update an object by specifying a property path and value to set.  example: `--set property1.property2=<value>`.. 