if (configuration == null) {
                configuration = new XmlNodeImpl("configuration");
            }
            Function<String, String> cb = Interpolator.memoize(callback);
            Function<String, String> it = s -> interpolator.interpolate(s, cb);
            configuration = new ExtensionInterpolator(it).transform(configuration);

            binder.bind(XmlNode.class)

        });
        return interpolator;
    }

    @Nonnull
    public static Function<String, String> prefix(String prefix, Function<String, String> cb) {
        return s -> {
            String v = null;
            if (s.startsWith(prefix)) {
                v = cb.apply(s.substring(prefix.length()));
            }
            return v;
        };
    }

    @SafeVarargs
    @Nonnull

            }
            list += '</ul>';
            this.container.find('.ranges').prepend(list);
        }

        if (typeof cb === 'function') {
            this.callback = cb;
        }

        if (!this.timePicker) {
            this.startDate = this.startDate.startOf('day');
            this.endDate = this.endDate.endOf('day');

    }

    private static Function<String, String> prefix(String prefix, Function<String, String> cb) {
        return s -> {
            String v = null;
            if (s.startsWith(prefix)) {
                v = cb.apply(s.substring(prefix.length()));
            }
            return v;
        };
    }