input-group-lg and input-group-sm Not Supported

[ishields]

I noticed input-group-lg and input-group-sm modifiers don't work out of the box.

To get these to work I added:

input-group.input-group-lg{
  span.twitter-typeahead{
    .form-control{
      @extend .form-control-lg;
      @include border-right-radius(0)
    }
  }
}

.input-group.input-group-sm{
  span.twitter-typeahead{
    .form-control{
      @extend .form-control-sm;
      @include border-right-radius(0)
    }
  }
}