[html-formfu] Attributes in Checkboxgroup

[Ascii King]

I have created a Checkboxgroup, but I cannot figure out how to place a 
class in the SPAN tag that surrounds each option. The tags breakdown 
like this:
<div>
    <span>
        <span class="HowDoIGetHERE?">
            <input>
            <label>
        </span>
    </span>
</div>

I want to know where do I specify the attribute to get the class into 
the place where it says  class="HowDoIGetHERE?" in the example above? I 
know it can be done. I have followed the code in Googlecode and figured 
out how to get class tags into everywhere else except that one.

Below is the code I am using and the results. I want to get into the 
empty span tag.

                  - type: Checkboxgroup
                    name: Meals
                    container_tag: div
                    container_attributes:
                      class: outerdiv
                      id: Meals_id
                    attributes:
                      class: outerspan
                    options:
                      - value: 1
                        label: Breakfast
                        attributes:
                          class: input-class
                        label_attributes:
                          class: label-class
                      - value: 1
                        label: Lunch
                        attributes:
                          class: input-class
                        label_attributes:
                          class: label-class



    <div class="outerdiv checkboxgroup" id="Meals_id">
        <span class="outerspan">
          <span>
            <input type="checkbox" value="1" class="input-class" />
            <label class="label-class" >Breakfast</label>
          </span>
          <span>
            <input type="checkbox" value="1" class="input-class" />
            <label class="label-class" >Lunch</label>
          </span>
        </span>
    </div>