Edit in JSFiddle

$import.mapMany({
    "module1": [
        "http://code.jquery.com/jquery-2.0.3.min.js",
        "http://cdnjs.cloudflare.com/ajax/libs/knockout/2.3.0/knockout-min.js"]
});

$import.modules("module1", function () {
    if (typeof jQuery != "undefined") {
        $("#output").append("<p>jQuery was loaded</p>");
    }

    if (typeof ko != "undefined") {
        $("#output").append("<p>Knockout JS was loaded</p>");
    }
});

<div id="output"></div>