title: Several options for checkout_option in GA Enhanced Ecommerce
body: <p>What would be the best way to register several options for a single checkout step with GA Enhanced ecommerce?</p>
  
  <p>As the documentation describes:</p>
  
  <pre><code>// Called when user has completed shipping options.
  function onShippingComplete(stepNumber, shippingOption) {
    ga('ec:setAction', 'checkout_option', {
      'step': stepNumber,
      'option': shippingOption
    });
  
    ga('send', 'event', 'Checkout', 'Option', {
       hitCallback: function() {
         // Advance to next page.
       }
    });
  }
  </code></pre>
  
  <p>The problem is that we collect the shipping and the payment option in one step, and we would like to track both selections. Here is our initial idea:</p>
  
  <pre><code>// Called when user has completed shipping and payment options.
  function onStepComplete(stepNumber, shippingOption,paymentOption ) {
    ga('ec:setAction', 'checkout_option', {
      'step': stepNumber,
      'option': shippingOption
    });
  
  ga('ec:setAction', 'checkout_option', {
      'step': stepNumber,
      'option': paymentOption
    });
  
    ga('send', 'event', 'Checkout', 'Option', {
       hitCallback: function() {
         // Advance to next page.
       }
    });
  }
  </code></pre>
  
  <p>Would this work as expected? Could we afterwards segment correctly?</p>