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function(e,t,r){"use strict";var n=r(439619),o=r(906046),i=r(315646),a=r(741623),s=n("%Map%",!0),l=o("Map.prototype.get",!0),u=o("Map.prototype.set",!0),c=o("Map.prototype.has",!0),f=o("Map.prototype.delete",!0),p=o("Map.prototype.size",!0);e.exports=!!s&&function(){var e,t={assert:function(e){if(!t.has(e))throw new a("Side channel does not contain "+i(e))},delete:function(t){if(e){var r=f(e,t);return 0===p(e)&&(e=void 0),r}return!1},get:function(t){if(e)return l(e,t)},has:function(t){return!!e&&c(e,t)},set:function(t,r){e||(e=new s),u(e,t,r)}};return t}}