CardHash.php

<?php
namespace oddEvan\TrainerDB\Content\Taxonomy;

use WebDevStudios\OopsWP\Structure\Content\Taxonomy;

class CardHash extends Taxonomy {
	protected $slug = 'card_hash';
	protected $object_types = [ 'card' ];

	protected function get_labels() : array {
		return [
			'name'                       => _x( 'Hashes', 'Taxonomy General Name', 'trainerdb' ),
			'singular_name'              => _x( 'Hash', 'Taxonomy Singular Name', 'trainerdb' ),
      // other labels go here
		];
	}
  
	protected function get_args() : array {
		return [
			'hierarchical' => false,
		];
	}
}