src, ok := claimToSource[r.claim]
	if !ok {
		// No distributed claim present.
		return nil
	}
	ep, ok := sources[src]
	if !ok {
		return fmt.Errorf("id token _claim_names contained a source %s missing in _claims_sources", src)
	}
	if ep.URL == "" {
		// This is maybe an aggregated claim (ep.JWT != "").
		return nil
	}
	return r.resolve(ctx, ep, c)
}

			},
			claims: fmt.Sprintf(`{
				"iss": "{{.URL}}",
				"aud": "my-client",
				"username": "jane",
				"_claim_names": {
						"groups": "src1"
				},
				"_claim_sources": {
						"src1": {
								"endpoint": "{{.URL}}/groups",
								"access_token": "groups_token"
						}
				},
				"exp": %d
			}`, valid.Unix()),
			claimToResponseMap: map[string]string{