public function trigger( $order_id, $partial_refund = false, $refund_id = null ) {
			$this->setup_locale();
			$this->partial_refund = $partial_refund;
			$this->id             = $this->partial_refund ? 'customer_partially_refunded_order' : 'customer_refunded_order';

			if ( $order_id ) {
				$this->object                         = wc_get_order( $order_id );
				$this->recipient                      = $this->object->get_billing_email();
				$this->placeholders['{order_date}']   = wc_format_datetime( $this->object->get_date_created() );
				$this->placeholders['{order_number}'] = $this->object->get_order_number();
			}

			if ( ! empty( $refund_id ) ) {
				$this->refund = wc_get_order( $refund_id );
			} else {
				$this->refund = false;
			}

			if ( $this->is_enabled() && $this->get_recipient() ) {
				$this->send( $this->get_recipient(), $this->get_subject(), $this->get_content(), $this->get_headers(), $this->get_attachments() );
			}

			$this->restore_locale();
		}