solidity/test/cmdlineTests/storage_layout_smoke_two_contracts/output.json

{
    "contracts":
    {
        "fileA":
        {
            "A":
            {
                "storageLayout":
                {
                    "storage": [],
                    "types": null
                }
            }
        }
    },
    "sources":
    {
        "fileA":
        {
            "id": 0
        },
        "fileB":
        {
            "id": 1
        }
    }
}