protected function registerTaxonomy()
    {
        if (! $this->isRegistered()) {
            $parameters = array_merge([
                'labels' => $this->getModel()->getLabels(),
                'rewrite' => ['slug' => $this->getModel()->getSlug()],
            ], $this->getModel()->getArguments());

            return register_taxonomy(
                $this->getModel()->getSlug(),
                $this->getBelongsTo(),
                $parameters
            );
        }

        throw new TaxonomyException("Taxonomy [{$this->model->getSlug()}] already exsist.");
    }
protected function registerTaxonomy()
    {
        if (! $this->isRegistered()) {
            $parameters = array_merge([
                'labels' => $this->getModel()->getLabels(),
                'rewrite' => ['slug' => $this->getModel()->getSlug()],
            ], $this->getModel()->getArguments());

            return register_taxonomy(
                $this->getModel()->getSlug(),
                $this->getBelongsTo(),
                $parameters
            );
        }

        throw new TaxonomyException("Taxonomy [{$this->model->getSlug()}] already exsist.");
    }
protected function registerTaxonomy ( ) { if ( ! $ this -> isRegistered ( ) ) { $ parameters = array_merge ( [ 'labels' => $ this -> getModel ( ) -> getLabels ( ) , 'rewrite' => [ 'slug' => $ this -> getModel ( ) -> getSlug ( ) ] , ] , $ this -> getModel ( ) -> getArguments ( ) ) ; return register_taxonomy ( $ this -> getModel ( ) -> getSlug ( ) , $ this -> getBelongsTo ( ) , $ parameters ) ; } throw new TaxonomyException ( "Taxonomy [{$this->model->getSlug()}] already exsist." ) ; }
Register taxonomy.

@return null|\WP_Error
Register taxonomy .