invalidFileNameSymbols property
List symbols that will be sanitized to '_' in the selected document name.
I.e. Google Drive allows symbol '/' in the document name,
but this symbol is not allowed in file name that will be saved locally.
Default list: '/'.
Example: file name 'Report_2018/12/08.txt' will be replaced to 'Report_2018_12_08.txt'
Implementation
final List<String> invalidFileNameSymbols;