this.$$name = () => {
      const [first] = new Error().stack.match(/at (.*?[3])/gi);
      return String(first).split(' ')[1];
    };

example Error
    at MyClass.GlobalClass.$$name (https://lvppu.csb.app/src/GlobalClass/index.js:27:30)
    at MyClass.anotherFu (https://lvppu.csb.app/src/index.js:28:32)
    at MyClass.__test__ (https://lvppu.csb.app/src/index.js:36:10)
    at eval (https://lvppu.csb.app/src/index.js:48:15)
    at Generator.next (<anonymous>)
    at asyncGeneratorStep (https://lvppu.csb.app/src/index.js:12:103)
    at _next (https://lvppu.csb.app/src/index.js:14:194)
    at eval (https://lvppu.csb.app/src/index.js:14:364)