Function ensureMethod

static/word2md/mammoth.browser.js:4353–4362

(obj, methodName)

}

function ensureMethod(obj, methodName) {
    var fn;
    if (obj != null) fn = obj[methodName];
    if (typeof fn !== "function") {
        var message = "Object " + util.classString(obj) + " has no method '" +
            util.toString(methodName) + "'";
        throw new Promise.TypeError(message);
    }
    return fn;
}

function caller(obj) {
    var methodName = this.pop();