def messages(group_id, options = {}, fetch_all = false)
      if fetch_all
        get_all_messages(group_id)
      else
        get_messages(group_id, options)
      end
    end
def messages(group_id, options = {}, fetch_all = false)
      if fetch_all
        get_all_messages(group_id)
      else
        get_messages(group_id, options)
      end
    end
List messages for a group

 @return [Array<Hashie::Mash>] Array of hashes representing the messages
 @see https://dev.groupme.com/docs/v3#messages_index
 @param group_id [String, Integer] Id of the group
 @param options [Hash] options hash that will be passed to the groupme call
 @param fetch_all [Boolean] if true, fetches all messages for the group