The richdocuments 3.4.2 version of the App is not compliant

[TP75]

Describe the bug
On the commandline a php occ app:check-code richdocumentsshows three (3) errors. The 3.4.2 version of the App is not compliant.

To Reproduce
On the commandline execute sudo -u www-data bash -c ' cd /var/www/nextcloud && php occ app:check-code richdocuments ' or similar.

Expected behavior
The 3.4.2 version of the app should pass the check-code analysis without error and the app should be compliant.

Screenshots
Output on the Un*x commandline was:

$ sudo -u www-data bash -c ' cd /var/www/nextcloud && php occ app:check-code richdocuments '
Nextcloud is in maintenance mode - no apps have been loaded

Analysing /var/www/nextcloud/apps/richdocuments/lib/Controller/DocumentController.php
 1 errors
    line  538: OC_Helper - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/richdocuments/lib/Controller/WopiController.php
 1 errors
    line  332: OC_User - Static method of private class must not be called
Analysing /var/www/nextcloud/apps/richdocuments/appinfo/app.php
 1 errors
    line   53: OC_Helper - Static method of private class must not be called
App is not compliant

Client details:
n.a.

Server details

Operating system: Debian 10.1 Buster -- Linux cloudX 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u1 (2019-09-20) x86_64 GNU/Linux

Web server: apache2-bin/stable,stable,now 2.4.38-3+deb10u1 amd64

Database: mariadb-server-10.3/stable,now 1:10.3.17-0+deb10u1 amd64

PHP version: php7.3/stable,now 7.3.9-1~deb10u1 all

Nextcloud version: 16.0.5.1

Version of the richdocuments app: 3.4.2

Version of Collabora Online: collabora / code : 4.0.6.1 from docker
DIGEST: 1b53e1119f92

[juliusknorr]

duplicate of #535