def get_all_commands_hash
      without_categories = {}
      category_command_map.each do |category, commands|
        without_categories.merge!(commands)
      end
      command_map.merge(without_categories)
    end
def get_all_commands_hash
      without_categories = {}
      category_command_map.each do |category, commands|
        without_categories.merge!(commands)
      end
      command_map.merge(without_categories)
    end
merges category_command_map and command_map,
 removing categories