1class StockQuery
 2  def initialize(symbol_textbox, shell_view, stock_service)
 3    @symbol_textbox = symbol_textbox
 4    @stock_service = stock_service
 5    @shell_view = shell_view
 6  end
 7
 8  def clicked(payload)
 9    stock = @stock_service.fetch(@symbol_textbox.text)
10    @shell_view.display(stock.to_s)
11  end
12end