code: function getElementNameForTransformation( rule, check ) {
  		if ( rule.element )
  			return rule.element;
  		if ( check )
  			return check.match( /^([a-z0-9]+)/i )[ 0 ];
  		return rule.left.getDefinition().element;
  	}
docs: Obtain element's name from transformation rule. It will be defined by #element, or #check or #left (styleDef.element).