{"schema": {"username1_frozen.options": {"name": "username1_frozen.options", "properties": {"username1_frozen.options.username": {"name": "username1_frozen.options.username", "type": "username", "title": "Username description frozen"}}, "type": "object", "title": "Common configuration"}}, "model": [{"key": "username1_frozen.options.username", "readOnly": true}], "form": [{"key": "username1_frozen.options.username", "pattern": "^[a-z_][a-z0-9_-]{0,30}[$a-z0-9_-]{0,1}$"}, {"title": "Configurer", "type": "submit"}]}