title: Unable to check checkbox in table cell
body: <p>I have this table:</p>
  
  <pre><code>&lt;iframe title="ManageLegs"&gt;
      &lt;table title="Leg Details"&gt;
          &lt;tr&gt;
              &lt;th class="headerRow"&gt;
                  &lt;div&gt;PAX&lt;/div&gt;
              &lt;/th&gt;
              &lt;th class="headerRow"&gt;
                  &lt;div&gt;Leg&lt;/div&gt;
              &lt;/th&gt;
          &lt;/tr&gt;
          &lt;tr&gt;
              &lt;td&gt;
                  &lt;input type="text"&gt;&lt;/input&gt;
              &lt;/td&gt;
              &lt;td&gt;
                  &lt;input type="checkbox"&gt;&lt;/input&gt;
              &lt;/td&gt;
          &lt;/tr&gt;
      &lt;/table&gt;
  &lt;/iframe&gt;
  </code></pre>
  
  <p>Accessing the textbox is working fine, but I can´t figure out how to check the checkbox.</p>
  
  <p>I use the following code in my PageObject class:</p>
  
  <pre><code>in_iframe(:title =&gt; 'ManageLegs') do |frame|
      table(:leg_details, title: 'Leg Details', :frame =&gt; frame)
      text_field(:pax) { leg_details_element['1']['PAX'].text_field_element }
      text_field(:aircraft) { leg_details_element['1']['Aircraft'].text_field_element }
      text_field(:show_leg_on_quote_pdf) { leg_details_element['1']['Leg'].checkbox_element }
  end
  </code></pre>
  
  <p>Which I am calling like this:</p>
  
  <pre><code>on(CharterInquirySavedPage).pax = "2"
  on(CharterInquirySavedPage).check_show_leg_on_quote_pdf
  </code></pre>
  
  <p>It is working fine for setting the pax-textbox, but fails when trying to check the checkbox:</p>
  
  <pre><code>NoMethodError: undefined method `check_show_leg_on_quote_pdf' for #&lt;CharterInquirySavedPage:0x00000004cfd420&gt;
  </code></pre>