def create_room_task(room_id, body, to_ids, params = {})
      to_ids = array_to_string(to_ids)
      if value = params[:limit]
        params[:limit] = time_to_integer(value)
      end
      post("rooms/#{room_id}/tasks", params.merge(body: body, to_ids: to_ids))
    end
def create_room_task(room_id, body, to_ids, params = {})
      to_ids = array_to_string(to_ids)
      if value = params[:limit]
        params[:limit] = time_to_integer(value)
      end
      post("rooms/#{room_id}/tasks", params.merge(body: body, to_ids: to_ids))
    end
Create new task of chat room

 @param room_id [Integer] ID of chat room
 @param body [String] Contents of task
 @param to_ids [Array<Integer>] Array of account ID of person in charge
 @param params [Hash] Hash of optional parameter
 @option params [Integer, Time] :limit (nil) Deadline of task (unix time)
 @return [Hashie::Mash]