The source project of this merge request has been removed.
Modules/FileDataWriter: warn if pattern does not yield unique files
While '%D' can yield unique files it has a resolution of 1s. If FileGenerator::next()
is called too often, output files will be overwritten and data will be lost.
Additionally: if an output file already exists (e.g., consecutive FileDataWriter runs without '%D' specified) files will be silently overwritten. How do we want to handle this?