Companion enum for DynamoDB's ReturnValues parameter (PutItem, UpdateItem,
DeleteItem). Provided for callers who prefer enum members over raw string
literals; the underlying option fields still accept the original
'NONE' | 'ALL_OLD' | 'ALL_NEW' | 'UPDATED_OLD' | 'UPDATED_NEW' string
literals too; this is purely additive and does not narrow what's accepted.
Companion enum for DynamoDB's
ReturnValuesparameter (PutItem, UpdateItem, DeleteItem). Provided for callers who prefer enum members over raw string literals; the underlying option fields still accept the original'NONE' | 'ALL_OLD' | 'ALL_NEW' | 'UPDATED_OLD' | 'UPDATED_NEW'string literals too; this is purely additive and does not narrow what's accepted.