code: function(el) {
  		var self = this,
  			$el = $(el);
  
  		if ($el.length > 1) {
  			$el.each(function() {
  				self.addElement(this);
  			});
  		} else if ($el.length === 0) {
  			throw new Error("Invalid element!");
  		}
  
  		if (this.$el.closest($el).length) {
  			throw new Error("Element is a child of this view. This is only for unrelated elements");
  		}
  		if ($el.closest(this.$el).length) {
  			throw new Error("Element is an ancestor of this view! Reconsider how you're using this view.");
  		}
  
  		// normalize
  		el = $el.get(0);
  
  		if (!this._trackedElements) {
  			this._trackedElements = [];
  		}
  		_(this._trackedElements).each(function(otherEl) {
  			var $otherEl = $(otherEl);
  
  			if ($otherEl.closest($el).length) {
  				throw new Error("Element is a child of another tracked element. This will cause problems.");
  			}
  			if ($el.closest($otherEl).length) {
  				throw new Error("Element is an ancestor of another tracked element. This will cause problems.");
  			}
  		});
  		this._trackedElements.push(el);
  	}
docs: track el as part of this view even though it's not a child..