set
Set key to node, returning the updated document.
If the key already exists, its current value is merged with node via JsonNode.piece — a put is additive within the node's own lattice. This matches ORMap.put's semantics and preserves the add-wins invariant for nested structure.
Throws
if the document was not configured with a replica id (i.e. it was deserialized and withReplica was not called beforehand).