lib/util/klass.js
function(method,klass){
    while(!!klass){
        var key = null,
            pro = klass.prototype;
        // find method in current klass
        Object.keys(pro).some(function(name){
            if (method===pro[name]){
                key = name;
                return !0;
            }
        });
        // method finded in klass
        if (key!=null){
            return {
                name:key,
                klass:klass
            };
        }
        klass = klass.supor;
    }
}
function(method,klass){
    while(!!klass){
        var key = null,
            pro = klass.prototype;
        // find method in current klass
        Object.keys(pro).some(function(name){
            if (method===pro[name]){
                key = name;
                return !0;
            }
        });
        // method finded in klass
        if (key!=null){
            return {
                name:key,
                klass:klass
            };
        }
        klass = klass.supor;
    }
}
find method in klass prototype chain