code: public function getTaxonomy($system_id)
      {
          foreach ($this->getTaxonomies() as $taxonomy) {
              if ($taxonomy->system_id === $system_id) {
                  return $taxonomy;
              }
          }
  
          return false;
      }
docs: Get taxonomy.
  
  @param [[@doctodo param_type:system_id]] $system_id [[@doctodo param_description:system_id]]
  
  @return unknown