if (input.medical_records) {
  // This physically removes the object perfectly
  delete input.medical_records;
}

return input;

for(var i=0; i<input.length; i++) {
  if(input[i].email) {
    // Replace real email with a deterministic synthetic string
    input[i].email = "user_" + input[i].id + "@redacted.local";
  }
}

return input;