question: public Optional < ObaUserDataItem > loadItem ( final ObaUserDataItem tableItem ) { DynamoDBMapper mapper = createDynamoDBMapper ( ) ; ObaUserDataItem item = mapper . load ( tableItem ) ; return Optional . ofNullable ( item ) ; }
target:  Loads an item from DynamoDB by primary Hash Key. Callers of this method should pass in an object which represents an item in the DynamoDB table item with the primary key populated.