code: function updateClassProp(context, index, addOrRemove) {
      var adjustedIndex = index + context[4 /* ClassOffsetPosition */];
      updateStyleProp(context, adjustedIndex, addOrRemove);
  }
docs: This method will toggle the referenced CSS class (by the provided index)
  within the given context.
  
  @param context The styling context that will be updated with the
  newly provided class value.
  @param index The index of the CSS class which is being updated.
  @param addOrRemove Whether or not to add or remove the CSS class