cfg 解析给class新增函数报错

[code-sunbo]

测试代码：

class GenericNumber<T> {
    zeroValue: T;
    add: (x: T, y: T) => T;
}
let myGenericNumber = new GenericNumber<number>();
myGenericNumber.zeroValue = 0;
myGenericNumber.add = function(x, y) { return x + y; };

let stringNumeric = new GenericNumber<string>();
stringNumeric.zeroValue = "";
stringNumeric.add = function(x, y) { return x + y; };

console.log(stringNumeric.add(stringNumeric.zeroValue, "test"));

log如下：

D:\code\ArkAnalyzer\src\core\graph\Cfg.ts:341                                 
             leftOp.setType(method.getReturnType().join('|'));                                                       
                                                          ^ 
TypeError: method.getReturnType is not a function     
    at Cfg.typeReference (D:\code\ArkAnalyzer\src\core\graph\Cfg.ts:341:55)     
    at Scene.typeReference (D:\code\ArkAnalyzer\src\Scene.ts:263:50)     
    at new Scene (D:\code\ArkAnalyzer\src\Scene.ts:65:14)     
    at run (D:\code\ArkAnalyzer\tests\SaveTest.ts:11:24)     
    at Object.<anonymous> (D:\code\ArkAnalyzer\tests\SaveTest.ts:17:1)     
    at Module._compile (node:internal/modules/cjs/loader:1376:14)     
    at Module.m._compile (D:\code\ArkAnalyzer\node_modules\ts-node\src\index.ts:1618:23)     
    at Module._extensions..js (node:internal/modules/cjs/loader:1435:10)     
    at Object.require.extensions.<computed> [as .ts] (D:\code\ArkAnalyzer\node_modules\ts-node\src\index.ts:1621:12)     
    at Module.load (node:internal/modules/cjs/loader:1207:32) 
Process exited with code 1