This is the Persistence class This is a persistence class Content of the object in XML representation Memory size of the object in byte Dumps the content of the object, both the XML representation as well as the additional datafiles required, into a byte representation. It will be returned as byte array. dumpContent() -- returns a byte array with full content dumpContent(Compression=1-9) -- Sets the data compression from 0 (no) to 9 (max) Restore the content of the object from a byte representation as stored by \"dumpContent\". It could be restored from any python object implementing the buffer protocol. restoreContent(buffer) -- restores from the given byte array