There is a command group 'az_eventgrid_namespace_topic space'. This group of commands could 'manage eventgrid namespace topic space'. 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_topic space_create'.The syntax is: az eventgrid namespace topic-space create --name
                                          --namespace-name
                                          --resource-group
                                          [--description]
                                          [--no-wait {0, 1, f, false, n, no, t, true, y, yes}]
                                          [--topic-templates]. The 1th example of the child command would be to use it to 'create topic space', the syntax is: az eventgrid namespace topic-space create -g rg --namespace-name name -n topic-space --topic-templates ['name=topicspace']. The parameter '--name --topic-space-name -n' is required. It is used to the topic space 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 topic space resource.. The parameter '--no-wait' is optional. do not wait for the long-running operation to finish.. The parameter '--topic-templates' is optional. the topic filters in the topic space.  support shorthand-syntax, json-file and yaml-file. try "??" to show more.. 