You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: exceptions_app.rb
    path of file: ./repos/rambulance/test/fake_app/lib
    
    the code of the file until where you have to start completion: class ExceptionsApp < Rambulance::ExceptionsApp
  def not_found; end

  def internal_s
    
  def not_found; end

  def internal_server_error
    render_custom_error_page
  end

  def not_acceptable
    render_custom_error_page
  end

  private
    def render_custom_error_page
      render inline: <<-BODY
        <html>
          <body>
            <h1>Custom error page</h1>
            <p>Something went wrong!</p>
          </body>
        </html>
      BODY
    end
end