cellseparator_only_on_first_cell_of_table.rb

class MyController < UIViewController
....
  def viewDidLoad 
    @note_table = rmq(self.view).append(UITableView, :top_stylesheet).get
    @note_table_delegate = NoteTableDelegate.new
    @note_table.delegate = @note_table_delegate
    @note_table.dataSource = @note_table_delegate
    @note_table.separatorColor = UIColor.clearColor
  end
...
end

class NoteTableDelegate
...
    def tableView(table_view, cellForRowAtIndexPath: index_path)
      data_row = @data[index_path.row]
      if index_path.row == 0
        cell1 = table_view.dequeueReusableCellWithIdentifier(FIRST_CELL_ID) || begin
            rmq.create(FirstCell, :item_cell, reuse_identifier: FIRST_CELL_ID).get
        end
        cell1.update(data_row)
        cell1
      else
        cell = table_view.dequeueReusableCellWithIdentifier(NOTE_CELL_ID) || begin
            rmq.create(NotesCell, :note_cell, reuse_identifier: NOTE_CELL_ID).get
        end
        cell.update(data_row)
        cell
      end
    end
....
end

class NotesCell < UITableViewCell
   ....
  def rmq_build
    rmq(self.contentView).tap do |q|
      @line = q.append(UIView, :line).get
    end
  end
   ...
end

class MyStylesheet < ApplicationStyleSheet
  def line(st)
    st.frame = {l: 0, t: 44, w: 350, h: 2}
    st.background_color = "#000000".to_color
  end
end