code: public function onBeforeWrite() {
  
  		parent::onBeforeWrite();
  
  		// Determine whether consolidated tags are found in the existing relationships.
  
  		$types = array();
  		foreach(singleton('FusionService')->getFusionTagTypes() as $type => $field) {
  			$types[$type] = $type;
  		}
  		$types = array_intersect($this->owner->many_many(), $types);
  		if(empty($types)) {
  
  			// There are no consolidated tags found, therefore update the tagging based on the fusion tags.
  
  			$tagging = array();
  			foreach($this->owner->FusionTags() as $tag) {
  				$tagging[] = $tag->Title;
  			}
  		}
  		else {
  
  			// Empty the fusion tags to begin.
  
  			$this->owner->FusionTags()->removeAll();
  
  			// There are consolidated tags found, therefore update the tagging based on these.
  
  			$tagging = array();
  			foreach($types as $relationship => $type) {
  				foreach($this->owner->$relationship() as $tag) {
  
  					// Update both the fusion tags and tagging (using the relationship causes caching issues).
  
  					$fusion = FusionTag::get()->byID($tag->FusionTagID);
  					$this->owner->FusionTags()->add($fusion);
  					$tagging[] = $fusion->Title;
  				}
  			}
  		}
  		$this->owner->Tagging = implode(' ', $tagging);
  	}
docs: Update the tagging to reflect the change, allowing searchable content.