title: AWS Step Functions - Transform input using ResultSelector
body: <p>I have a step function with multiple parallel steps. each having lambdas.
  output of one parallel function is supplied to next parallel function.</p>
  <p>i would like to tranform output of 1st function</p>
  <p>{&quot;x&quot;:11111, &quot;y&quot;:&quot;New&quot;} to</p>
  <p>{&quot;x&quot;:11111, &quot;y&quot;:&quot;Existing&quot;} this will then be the input of second function</p>
  <p>i tried achieve it like below</p>
  <p>&quot;ResultSelector&quot;: {
  &quot;x.$&quot;: &quot;$.x&quot;,
  &quot;y.$&quot;: &quot;Existing&quot;
  }
  i get the below error when i try to save it
  The value for the field 'y.$' must be a valid JSONPath or a valid intrinsic function call</p>
  <p>my question here is it possible to hardcode value here.
  any other way of achieving this?</p>