A provided toggle-switch control that can be used to render instances
module:br-presenter/node/SelectionField within presenter.
This class is constructed by presenter automatically on your behalf.
The toggle-switch control is aliased by br.toggle-switch,
and can be used within templates as follows:
<span data-bind="controlNode:selectionFieldProperty, control:'br.toggle-switch'"></span>
The toggle-switch control can only be used to display
having exactly two options.