(maper for return from datasources) Support for resolve type from generic services.

[mikolajmitura]

Something like mapper above service.
So generic service will invoke mapping/datastorages and by default will return combination from all returned datastorages responses:

so by default will does:

db-datastorage:

{
"id": 1,
"name":  "name value"
}

mongo-datastorage:

{
"uuid": "uuid value",
"surname": "surname value"
}

will combine to:

{
"id": 1,
"name": "name value",
"uuid": "uuid value",
"surname":  "surname value"
}

should based on #1
so when occurred field name duplication then write mapper script like below:

=*dataStorages // it will map from all data storages, this is default mapping for datastorages to service response
id=$mappingContext['db-datastorage'].id // it will put to id from result id from db-datastorage 

but this mapper will have additional function like "=*dataStorages" which under the hood will does:

=$mappingContext['db-datastorage']
=$mappingContext['mongo-datastorage']

should be opportunity for code/script for this mapper or point out normal java class for it.