Read the persisted dataset identity. Returns the content hash, or null when the file is missing, empty (a first write cut off before close), unparsable, hashless, or from another key encoding — every case where the files' provenance is unknown.
Read the persisted dataset identity. Returns the content hash, or null when the file is missing, empty (a first write cut off before close), unparsable, hashless, or from another key encoding — every case where the files' provenance is unknown.