Dynamic names output

https://github.com/Azure/azure-docs-json-samples/blob/6ea9e0e0ddff26ef1272949e49e62a7909a7f863/azure-resource-manager/multipleinstance/copyvariables.json#L32

Not an issue, but it would be nice to have generation of dynamic names output.
Someting like this
```
"outputs": {
"networks": {
"type": "array",
"copy": {
"count": "[length(variables('networks'))]",
"input": "[variables('networks')[copyIndex()]]",
"name": "[concat('some', variables('networks')[copyIndex()])]"
}
}
}
```
So, this code just expand array, and 'networks' property is not put to the output