[mfojtik@dev ~]$ cat /tmp/t.yaml
{
    "kind": "List",
    "apiVersion": "v1",
    "metadata": {},
    "items": [
        {
            "apiVersion": "image.openshift.io/v1",
            "kind": "ImageStream",
            "metadata": {
                "labels": {
                    "foo": "bar"
                },
                "name": "test"
            }
        }
    ]
}

[mfojtik@dev origin]$ oc apply -l foo=bar -f /tmp/t.yaml --loglevel=5
I0517 13:33:13.110125   27191 decoder.go:220] decoding stream as JSON
obj=&{Object:map[apiVersion:v1 metadata:map[] kind:List] Items:[{Object:map[metadata:map[labels:map[foo:bar] name:test] apiVersion:image.openshift.io/v1 kind:ImageStream]}]}
F0517 13:33:13.184645   27191 helpers.go:119] error: object does not implement the Object interfaces