How to convert query with withHttpConfig to customGET

Hi How to convert this query

Restangular.one('user/export/excel').withHttpConfig({responseType: 'blob'}).get().then(function(response) {
             var url = (window.URL || window.webkitURL).createObjectURL(response);
             window.open(url,"_self");
        })

to

var _userService = Restangular.all('user');

_userService.customGET('export/excel').withHttpConfig({responseType: 'blob'}).get().then(function(response) {
             var url = (window.URL || window.webkitURL).createObjectURL(response);
             window.open(url,"_self");
        })

[ConcurrentHashMap]

var _userService = Restangular.all('user');

_userService.withHttpConfig({responseType: 'blob'}).customGET('export/excel').then(function(response) {
    var url = (window.URL || window.webkitURL).createObjectURL(response);
    window.open(url,"_self");
})

should work.

[bostrom]

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