lib/mux.js
function _defPrivateProperty(name, value) {
        if (instanceOf(value, Function)) value = value.bind(model)
        _privateProperties[name] = value
        $util.def(model, name, {
            enumerable: false,
            value: value
        })
    }
function _defPrivateProperty(name, value) {
        if (instanceOf(value, Function)) value = value.bind(model)
        _privateProperties[name] = value
        $util.def(model, name, {
            enumerable: false,
            value: value
        })
    }
function _defPrivateProperty ( name , value ) { if ( instanceOf ( value , Function ) ) value = value . bind ( model ) _privateProperties [ name ] = value $util . def ( model , name , { enumerable : false , value : value } ) }
define priavate property of the instance object
define priavate property of the instance object