bin/cli.js
function(rcb) {
                    return function() {
                        if (frc || !db[cname]) {
                            bindColCtls(db);
                        }
                        if (rcb) {
                            rcb.apply(this, arguments);
                        }
                    }
                }
function(rcb) {
                    return function() {
                        if (frc || !db[cname]) {
                            bindColCtls(db);
                        }
                        if (rcb) {
                            rcb.apply(this, arguments);
                        }
                    }
                }
creating callback with collection rebuilding