How to use the pilot/console.error function in pilot

Promise.prototype._complete = function(list, status, data, name) {
    // Complain if we've already been completed
    if (this._status != PENDING) {
        console.group('Promise already closed');
        console.error('Attempted ' + name + '() with ', data);
        console.error('Previous status = ', this._status,
                ', previous value = ', this._value);
        console.trace();

        if (this._completeTrace) {
            console.error('Trace of previous completion:');
            this._completeTrace.log(5);
        }
        console.groupEnd();
        return this;
    }

    if (_traceCompletion) {
        this._completeTrace = new Trace(new Error());
    }

    this._status = status;
    this._value = data;

    // Call all the handlers, and then delete them
    list.forEach(function(handler) {
        handler.call(null, this._value);

Promise.prototype._complete = function(list, status, data, name) {
    // Complain if we've already been completed
    if (this._status != PENDING) {
        console.group('Promise already closed');
        console.error('Attempted ' + name + '() with ', data);
        console.error('Previous status = ', this._status,
                ', previous value = ', this._value);
        console.trace();

        if (this._completeTrace) {
            console.error('Trace of previous completion:');
            this._completeTrace.log(5);
        }
        console.groupEnd();
        return this;
    }

    if (_traceCompletion) {
        this._completeTrace = new Trace(new Error());
    }

    this._status = status;

/**
     * Executes the command and ensures request.done is called on the request in 
     * case it's not marked to be done already or async.
     */
    function execute() {
        command.exec(env, request.args, request);
        
        // If the request isn't asnync and isn't done, then make it done.
        if (!request.isAsync && !request.isDone) {
            request.done();
        }
    }
    
    
    if (request.getStatus() == Status.INVALID) {
        console.error("Canon.exec: Invalid parameter(s) passed to " + 
                            command.name);
        return false;   
    } 
    // If the request isn't complete yet, try to complete it.
    else if (request.getStatus() == Status.INCOMPLETE) {
        // Check if the sender has a ArgsProvider, otherwise use the default
        // build in one.
        var argsProvider;
        var senderObj = env[sender];
        if (!senderObj || !senderObj.getArgsProvider ||
            !(argsProvider = senderObj.getArgsProvider())) 
        {
            argsProvider = defaultArgsProvider;
        }

        // Ask the paramProvider to complete the request.

function imageUrl(path) {
    var dataUrl = require('text!cockpit/ui/' + path);
    if (dataUrl) {
        return dataUrl;
    }

    var filename = module.id.split('/').pop() + '.js';
    var imagePath;

    if (module.uri.substr(-filename.length) !== filename) {
        console.error('Can\'t work out path from module.uri/module.id');
        return path;
    }

    if (module.uri) {
        var end = module.uri.length - filename.length - 1;
        return module.uri.substr(0, end) + path;
    }

    return filename + path;
}

function imageUrl(path) {
    var dataUrl;
    try {
        dataUrl = require('text!cockpit/ui/' + path);
    } catch (e) { }
    if (dataUrl) {
        return dataUrl;
    }

    var filename = module.id.split('/').pop() + '.js';
    var imagePath;

    if (module.uri.substr(-filename.length) !== filename) {
        console.error('Can\'t work out path from module.uri/module.id');
        return path;
    }

    if (module.uri) {
        var end = module.uri.length - filename.length - 1;
        return module.uri.substr(0, end) + "/" + path;
    }

    return filename + path;
}

function imageUrl(path) {
    var dataUrl;
    try {
        dataUrl = require('text!cockpit/ui/' + path);
    } catch (e) { }
    if (dataUrl) {
        return dataUrl;
    }

    var filename = module.id.split('/').pop() + '.js';
    var imagePath;

    if (module.uri.substr(-filename.length) !== filename) {
        console.error('Can\'t work out path from module.uri/module.id');
        return path;
    }

    if (module.uri) {
        var end = module.uri.length - filename.length - 1;
        return module.uri.substr(0, end) + "/" + path;
    }

    return filename + path;
}

function imageUrl(path) {
    var dataUrl = require('text!cockpit/ui/' + path);
    if (dataUrl) {
        return dataUrl;
    }

    var filename = module.id.split('/').pop() + '.js';
    var imagePath;

    if (module.uri.substr(-filename.length) !== filename) {
        console.error('Can\'t work out path from module.uri/module.id');
        return path;
    }

    if (module.uri) {
        var end = module.uri.length - filename.length - 1;
        return module.uri.substr(0, end) + path;
    }

    return filename + path;
}

persistValue: function(settings, key, value) {
        try {
            var stringData = JSON.stringify(settings._saveToObject());
            cookie.set('settings', stringData);
        } catch (ex) {
            console.error('Unable to JSONify the settings! ' + ex);
            return;
        }
    }
};

persistValue: function(settings, key, value) {
        try {
            var stringData = JSON.stringify(settings._saveToObject());
            cookie.set('settings', stringData);
        } catch (ex) {
            console.error('Unable to JSONify the settings! ' + ex);
            return;
        }
    }
};

persistValue: function(settings, key, value) {
        try {
            var stringData = JSON.stringify(settings._saveToObject());
            cookie.set('settings', stringData);
        } catch (ex) {
            console.error('Unable to JSONify the settings! ' + ex);
            return;
        }
    }
};