Function __extends

docs/app/js/sanddance-app.js:20174–20180

(d, b)

    return extendStatics(d1, b1);
};
function __extends(d, b) {
    extendStatics(d, b);
    function __() {
        this.constructor = d;
    }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
}
var __assign = function() {
    __assign = Object.assign || function __assign(t) {
        for(var s, i = 1, n = arguments.length; i < n; i++){