Prevent superfluous processing of already-processed form fields. Since casper already handles fields with the same name (checkbox, radio) in `getFieldValue`, we shouldn't process already-processed form fields again in the main loop of `getFormValues`.
Prevent superfluous processing of already-processed form fields.
Since casper already handles fields with the same name (checkbox, radio)
in `getFieldValue`, we shouldn't process already-processed form fields
again in the main loop of `getFormValues`.

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