docs: function() {
  		
  		var self = this,
  			p = self.__options.interactive ? 'auto' : '';
  		
  		// this will be useful to know quickly if the tooltip is in
  		// the DOM or not 
  		self._$tooltip
  			.attr('id', self.__namespace)
  			.css({
  				// pointer events
  				'pointer-events': p,
  				zIndex: self.__options.zIndex
  			});
  		
  		// themes
  		// remove the old ones and add the new ones
  		$.each(self.__previousThemes, function(i, theme) {
  			self._$tooltip.removeClass(theme);
  		});
  		$.each(self.__options.theme, function(i, theme) {
  			self._$tooltip.addClass(theme);
  		});
  		
  		self.__previousThemes = $.merge([], self.__options.theme);
  		
  		return self;
  	}