Adds writing support to the {@link PropertySet} class.
Please be aware that this class' functionality will be merged into the {@link PropertySet} class at a later time, so the API will change.
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final String name, final PropertySet ps) throws WritingNotSupportedException, IOException { final DirectoryEntry de = getPath(poiFs, path); final MutablePropertySet mps = new MutablePropertySet(ps); de.createDocument(name, mps.toInputStream()); }