Deprecation: #65728 - DocumentTemplate->issueCommand() 

See forge#65728

Description 

Method TYPO3CMSBackendTemplateDocumentTemplate::issueCommand() has been marked as deprecated.

Affected Installations 

Instances with custom backend modules that use this method.

Migration 

Use TYPO3CMSBackendUtilityBackendUtility::getLinkToDataHandlerAction() instead.