sven can you add it to the readme so that when I turn it into a pier chapter we 
get it :)



> Using the newly added NeoJSONCustomMapping>>#mapWithValueSchema: this is now 
> possible, as the following unit test shows:
> 
> testDictionaryOfObject2
>  | data json reader |
>  data := Dictionary new.
>  data 
>    at: #one put: NeoJSONTestObject2 example1;
>    at: #two put: NeoJSONTestObject2 example1.
>  json := NeoJSONWriter toString: data.
>  reader := NeoJSONReader on: json readStream.
>  reader for: #DictionaryOfObject2 customDo: [ :mapping |
>    mapping mapWithValueSchema: NeoJSONTestObject2 ].  
>  self 
>    assert: (reader nextAs: #DictionaryOfObject2)
>    equals: data
> 
> Note that the mapping mechanism in NeoJSON is optional. Without mapping you 
> get Arrays and Dictionaries back, that you can then convert to your domain 
> objects in the a next step. With mapping however, these intermediary 
> representations are not used and maps or lists are parsed while creating and 
> populating your domain objects directly, which should be more efficient. This 
> does of course introduce the necessity of adding some form of static typing.

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