TYPO3 CType based dropdown values

Add dropdown values depending on ctype

# Add Layout for squares, ctype textmedia only, layout is the typo3 field name
TCEFORM.tt_content.layout {
  # Just remove em all
  removeItems = 0,1,2,3,4,5,6,7,90
 
  altLabels.1 = LLL:EXT:extension_key/Resources/Private/Language/locallang_db.xlf:headline.1
  addItems {
    6 = Label 1
    7 = Label 2
  }
  types {
    # ctype name
    textmedia {
      keepItems = 6,7
    }
    menu_pages {
      keepItems = 8,9
    }
  }
}