post409 option in InMemoryBackEndConfigArgs labelled incorrectly

[dylanesque]

Lines 74-78 from interfaces.d.ts:

/**
 * false (default) should NOT update existing item with POST. false: OK to update.
 */
 post409?: boolean;
 /**

Which is which? There's also the question of this feature being broken entirely, since setting the value to 'true' in 'app.module.ts' doesn't seem to change anything:

 HttpClientInMemoryWebApiModule.forRoot(
 InMemoryDataService, { dataEncapsulation: false, delay: 500, post409: true }
 ),