public Optional<ObaUserDataItem> loadItem(final ObaUserDataItem tableItem){
  DynamoDBMapper mapper=createDynamoDBMapper();
  ObaUserDataItem item=mapper.load(tableItem);
  return Optional.ofNullable(item);
}

public Optional < ObaUserDataItem > loadItem ( final ObaUserDataItem tableItem ) { DynamoDBMapper mapper = createDynamoDBMapper ( ) ; ObaUserDataItem item = mapper . load ( tableItem ) ; return Optional . ofNullable ( item ) ; }
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 .
