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node_modules/symbol-observable/lib/ponyfill.js

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+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+	value: true
+});
+exports.default = symbolObservablePonyfill;
+function symbolObservablePonyfill(root) {
+	var result;
+	var _Symbol = root.Symbol;
+
+	if (typeof _Symbol === 'function') {
+		if (_Symbol.observable) {
+			result = _Symbol.observable;
+		} else {
+			result = _Symbol('observable');
+			_Symbol.observable = result;
+		}
+	} else {
+		result = '@@observable';
+	}
+
+	return result;
+};