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Any idea how I can fix this? The standard way I have used so far was the apply method, but in this case, it does not seem to help :disappointed:

Turns out that I need to do an apply on that output to be usable:
```foobar_keyvault_name = stack_ref.require_output(f"{source_stack_name}-kv-name")

barfoo_app_settings = azure_native.web.WebAppApplicationSettings(
    f"{name}-app-settings",
    name=barfoo_api_app.name,
    properties={
        "QUICKFOXPASS": foobar_keyvault_name.apply(lambda x :f"@Microsoft.KeyVault(VaultName={x};SecretName=QUICKFOX-PASSWORD)"
    },
    resource_group_name=foobar_resource_group_name,
)```