Customizing simple_form boolean input

[Jasper Rädisch]

Good morning!

(This is a cross post from http://stackoverflow.com/questions/41996812/customizing-simple-form-boolean-input but I figured this is the preferred channel. Please feel free to answer wherever you like.)

To add some markup to a boolean input (checkbox), I am trying to create a custom input like this:

    class BooleanWithIconInput < SimpleForm::Inputs::BooleanInput

      def input(wrapper_options)

        super

      end

    end

The problem is, that this input is already displayed differently, since it is missing a `<div class="checkbox">` container and it adds classes like `control_label` and `form_control`.

Why is that happening, and how can I get the same behaviour?

Thank you for an excellent gem!

Jasper