Log all calls to some object by wrapping all his methods

logwrapper.js

var lw = {
    wrap: function(type, onlyOwnProperties) {
        for (var key in type) {
            if (typeof type[key] === 'function') {
                if (onlyOwnProperties && !type.hasOwnProperty(key)) {
                    continue;
                }

                (function(methodName) {
                    var _method = type[methodName];
                    type[methodName] = function() {
                        var result = _method.apply(this, arguments);
                        console.log(methodName, arguments, '>>>', result);
                        return result;
                    };
                })(key);
            }
        }
    },
    
    // This one works:
    // - wrap original method
    // - copy own props from original method to wrapper
    wrapMethod: function(obj, methodName) {
        var _method = obj[methodName];
        
        obj[methodName] = function() {
            var result = _method.apply(obj, arguments);
            console.log(methodName, arguments, '>>>', result);
            return result;
        };

        for (var prop in _method) {
            if (_method.hasOwnProperty(prop)) {
                obj[methodName][prop] = _method[prop];
            }
        }
    }

};

Now we see method output.

https://gist.github.com/chestozo/478e1b7f901fd8b96fbf39fc4a7bb114 ???