public function get_product_categories( $fields = null ) {
		try {
			// Permissions check
			if ( ! current_user_can( 'manage_product_terms' ) ) {
				throw new WC_API_Exception( 'woocommerce_api_user_cannot_read_product_categories', __( 'You do not have permission to read product categories', 'woocommerce' ), 401 );
			}

			$product_categories = array();

			$terms = get_terms( 'product_cat', array( 'hide_empty' => false, 'fields' => 'ids' ) );

			foreach ( $terms as $term_id ) {
				$product_categories[] = current( $this->get_product_category( $term_id, $fields ) );
			}

			return array( 'product_categories' => apply_filters( 'woocommerce_api_product_categories_response', $product_categories, $terms, $fields, $this ) );
		} catch ( WC_API_Exception $e ) {
			return new WP_Error( $e->getErrorCode(), $e->getMessage(), array( 'status' => $e->getCode() ) );
		}
	}