I cannot extend a Typescript Script Include into a ServiceNow proper Script Include

[brandonsmith-nuvolo]

If I have a Script Include that I created via Sincronia and is Typescript. I cannot extend that Script Include via the typical extension method.

var SiName = Class.create();
SiName.prototype = Object.extendsObject(TypescriptSi, ({
    initialize: function() {
    },

    type: 'SiName'
}));

If you were to run this code, when this Script Include is instantiated you will see an error

"TypeError: Method "toString" called on incompatible object."