Allow to generate push-config.json for several selected variants at once

the feature of UPS Console where you can generate push-config.json under the Example implementation is pretty cool:

{
  "pushServerURL": "http://localhost:8080/ag-push/",
  "android" : {
    "senderID": "234",
    "variantID": "a85cdfad-969c-4ab3-80bd-65a661bfd1a1",
    "variantSecret": "da2ffc3a-96bf-4ee1-81fe-92721569c407"
  }
}

I would like to build on top of it.

Especially for demo purposes, it would be nice to generate multi-variant
configs at once, such as bellow.

But the problem comes when you have more variants per one type, I have some
ideas here:

a) generate multi-configs and include all variants with comments what
config stands for what variant
b) generate multi-configs ONLY when there is at most one variant per type
c) use alternative approach and allow to generate push-config.json
according to user-selected variants (selection such as in Send Push feature)

{
  "pushServerURL": "http://localhost:8080/ag-push/",
  "android" : {
    "senderID": "234",
    "variantID": "a85cdfad-969c-4ab3-80bd-65a661bfd1a1",
    "variantSecret": "da2ffc3a-96bf-4ee1-81fe-92721569c407"
  },
  "ios" : {
     ...
  },
  "windows" : {
     ...
  },
  "firefoxos" : {
     ...
  }
}