There is a command group 'az_eventgrid_namespace_client group'. This group of commands could 'manage eventgrid namespace client group'. 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_eventgrid_namespace_client group_create'.The syntax is: az eventgrid namespace client-group create --client-group-name
                                           --namespace-name
                                           --resource-group
                                           [--description]
                                           [--group-query]
                                           [--no-wait {0, 1, f, false, n, no, t, true, y, yes}]. The 1th example of the child command would be to use it to 'create client group', the syntax is: az eventgrid namespace client-group create -g rg --namespace-name name -n client-group --group-query "attributes.floor=6". The parameter '--client-group-name --name -n' is required. It is used to the client group name.. The parameter '--namespace-name' is required. It is used to name of the namespace.. The parameter '--resource-group -g' is required. It is used to name of resource group. you can configure the default group using `az configure --defaults group=<name>`.. The parameter '--description' is optional. description for the client group resource.. The parameter '--group-query' is optional. the grouping query for the clients.. The parameter '--no-wait' is optional. do not wait for the long-running operation to finish.. 