text: // sample start
  // this should be changed
  const a = 1;
  
  // below two shouldn't
  var keep = { const: 1 };
  keep.const = 2;
  
  // only function assignment should be changed
  const foo = function () {
    console.log('cannot change me');
    console.log('some const s should be left unchanged');
  };
  // sample end
  