Function isFunction

test-app/public/sinon.js:3573–3575

(obj)

    var valueToString = require("@sinonjs/commons").valueToString;
    
    function isFunction(obj) {
        return typeof obj === "function" || Boolean(obj && obj.constructor && obj.call && obj.apply);
    }
    
    function mirrorProperties(target, source) {
        for (var prop in source) {