code: function( element, styleName, attrName ) {
  			attrName = attrName || styleName;
  
  			if ( !( attrName in element.attributes ) ) {
  				var value = element.styles[ styleName ],
  					match = value && value.match( /^(\d+)(?:\.\d*)?px$/ );
  
  				if ( match )
  					element.attributes[ attrName ] = match[ 1 ];
  				// Pass the TEST_VALUE used by filter#check when mocking element.
  				else if ( value == TEST_VALUE )
  					element.attributes[ attrName ] = TEST_VALUE;
  			}
  
  			delete element.styles[ styleName ];
  		}
docs: Converts length in the `styleName` style to a valid length attribute (like `width` or `height`).
  
  @param {CKEDITOR.htmlParser.element} element
  @param {String} styleName Name of the style that will be converted.
  @param {String} [attrName=styleName] Name of the attribute into which the style will be converted.