},h}();return function(n,i,e){t=e,s=e().$utils(),e.duration=function(t,s){var n=e.locale();return o(t,{$l:n},s)},e.isDuration=r;var u=i.prototype.add,h=i.prototype.subtract;i.prototype.add=function(t,s){return r(t)&&(t=t.asMilliseconds()),u.bind(this)(t,s)},i.prototype.subtract=function(t,s){return r(t)&&(t=t.asMilliseconds()),h.bind(this)(t,s)}}});