upsert
fun <T : Any> upsert(value: T, writeStrategy: DittoWriteStrategy = DittoWriteStrategy.Merge): DittoDocumentID
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Inserts a new document into the collection and returns its ID. If the document already exists, the behavior is determined by the given writeStrategy.
Return
the ID of the inserted document.
Parameters
value
the value to insert into the collection.
write
specifies the desired strategy for inserting a document. The default value is DittoWriteStrategy.Merge.