I have multiple Y.Button instances that are logically associated and need to be managed as a group.
For example, you may need a radio group, so when one button becomes selected, the others are unselected. Or a checkbox group, which allows you to select multiple buttons and at some point you need to obtain the values of all selected buttons.
Note: A push group is really just a checkbox group, but with Y.Button instances whose types are push
as opposed to toggle
.