```var __fn_prototype = {}; Object.defineProperty(...
# general
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Copy code
var __fn_prototype = {};
Object.defineProperty(__fn_prototype, "constructor", { configurable: true, writable: true, value: __f1 });
__fn.prototype = __fn_prototype;
var __fn_sym = Object.create(global.Symbol.prototype);
__fn[__fn_sym] = __fn;