src/sys/examples/topology/meta/echo_server.cml

// Component manifest for the `echo_server` example program, which hosts the Echo service used
// by `echo_client`.
{
    "program": {
        "binary": "bin/echo_server",
    },
    "expose": [
        {
            "service": "/svc/fidl.examples.topology.echo.Echo",
            "from": "self",
        },
    ],
}