babel/packages/babel-plugin-proposal-optional-chaining-assign/test/fixtures/general/private-field/input.js

class A {
  #x;

  method() {
    obj?.#x = 1;
    obj?.#x += 2;
    obj?.#x ??= 3;
    obj?.#x.y = 4;
    obj?.#x.y += 5;
    obj?.#x.y ??= 6;
  }
}