GraphQL: Nested field value as alias value

Question

Can you please tell me if it is possible to get the value of the nested field as the value of the alias.

query getItemList{
  item{
    name
    source: itemSource {
      name
    }
  }
}

# response
{
  name: "someItem",
  source: { name: "someName" }
}

# want to get
{
  name: "someItem",
  source: "someName"
}