code: function() {
  					var range = self.getRanges()[ 0 ].clone(),
  						enclosed, selected;
  
  					// Check first any enclosed element, e.g. <ul>[<li><a href="#">item</a></li>]</ul>
  					for ( var i = 2; i && !( ( enclosed = range.getEnclosedNode() ) && ( enclosed.type == CKEDITOR.NODE_ELEMENT ) && styleObjectElements[ enclosed.getName() ] && ( selected = enclosed ) ); i-- ) {
  						// Then check any deep wrapped element, e.g. [<b><i><img /></i></b>]
  						range.shrink( CKEDITOR.SHRINK_ELEMENT );
  					}
  
  					return selected && selected.$;
  				}
docs: Figure it out by checking if there's a single enclosed node of the range.