Deprecation: #78279 - Deprecate top.TYPO3.Backend.ContentContainer.iframe

See Issue #78279

Description

The property top.TYPO3.Backend.ContentContainer.iframe has been marked as deprecated.

Impact

Using this property will stop working in TYPO3 v9.

Affected Installations

All installations using top.TYPO3.Backend.ContentContainer.iframe.

Migration

Use accessor method top.TYPO3.Backend.ContentContainer.get() instead.