question: private void markLocalizedFileAsInvalid ( DropExporter dropExporter , DropFile file , Throwable cause ) { try { dropExporter . addCommentToFile ( file . getId ( ) , "Invalid localized file must be reviewed.\n" + cause . getMessage ( ) ) ; } catch ( Throwable t ) { logger . debug ( "Cannot add mark source file as invalid" , t ) ; } }
target:  Marks a file as invalid by adding a simple comment to it.