code: function(classes_string) {
  
  		var classes = [];
  
  		if (Lava.schema.view.VALIDATE_CLASS_NAMES) {
  			this.assertClassStringValid(classes_string);
  		}
  
  		if (classes_string != '') {
  
  			classes = classes_string.split(/\s+/);
  
  		}
  
  		return classes;
  
  	}
docs: Split a string into array of class names
  @param {string} classes_string
  @returns {Array}