[Ur] A question involving type `string` and field names

[Stefan Scott Alexander]

Given a string `myFld` such as:

  val myFld = "Field1"

and a record such as:

  val myRec = [ Field1 = "foo", Field2 = "bar" ]

Is there any way to access `Field1` of record `myRec`, by using the value
of string `myFld` ?
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