private void Load()
        {
            var targetExtensions = _extensibilityService.LoadExtensions <ITextTemplateEngine>();

            foreach (var extension in targetExtensions)
            {
                _engines.Add(extension);
            }
        }
        public void Initialize()
        {
            var commands = _extensibility.LoadExtensions <ICommand>();

            foreach (var command in commands)
            {
                if (!_commands.ContainsKey(command.Name))
                {
                    _commands.Add(command.Name, command);
                }
            }
        }