public function hold_applied_coupons( $billing_email ) {
		$held_keys          = array();
		$held_keys_for_user = array();
		$error              = null;

		try {
			foreach ( WC()->cart->get_applied_coupons() as $code ) {
				$coupon = new WC_Coupon( $code );
				if ( ! $coupon->get_data_store() ) {
					continue;
				}

				// Hold coupon for when global coupon usage limit is present.
				if ( 0 < $coupon->get_usage_limit() ) {
					$held_key = $this->hold_coupon( $coupon );
					if ( $held_key ) {
						$held_keys[ $coupon->get_id() ] = $held_key;
					}
				}

				// Hold coupon for when usage limit per customer is enabled.
				if ( 0 < $coupon->get_usage_limit_per_user() ) {

					if ( ! isset( $user_ids_and_emails ) ) {
						$user_alias          = get_current_user_id() ? wp_get_current_user()->ID : sanitize_email( $billing_email );
						$user_ids_and_emails = $this->get_billing_and_current_user_aliases( $billing_email );
					}

					$held_key_for_user = $this->hold_coupon_for_users( $coupon, $user_ids_and_emails, $user_alias );

					if ( $held_key_for_user ) {
						$held_keys_for_user[ $coupon->get_id() ] = $held_key_for_user;
					}
				}
			}
		} catch ( Exception $e ) {
			$error = $e;
		} finally {
			// Even in case of error, we will save keys for whatever coupons that were held so our data remains accurate.
			// We save them in bulk instead of one by one for performance reasons.
			if ( 0 < count( $held_keys_for_user ) || 0 < count( $held_keys ) ) {
				$this->get_data_store()->set_coupon_held_keys( $this, $held_keys, $held_keys_for_user );
			}
			if ( $error instanceof Exception ) {
				throw $error;
			}
		}
	}