How to make a MutableDictionary into a immutable

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toMutable()

Bug in Document.toMutable() in db21

I’m using the following code with DB21 to save a document that was previously read from the db: MutableDocument mutable = document.toMutable(); database.save(mutable); The problem is that while document.getKeys() returns 7 keys, mutable.getKeys() returns 0. It seems that toMutable does not copy over the actual keys from the source document. Looking at the code for toMutable: public MutableDocument toMutable() { return new MutableDocument(this, null); } shouldn’t the sec…