Redactors take a response as their first argument, and some take additional arguments: redact_headers(), for example, requires that you specify headers. This function allows you to take a simplified expression via a formula, similar to what purrr does, so that you can provide the function to capture_requests().
as.redactor(fmla)
Arguments
fmla: Partial expression (a formula) to turn into a function
Returns
A function.
Details
For example, as.redactor(~ redact_headers(., "X-Custom-Header")) is equivalent to function (response) redact_headers(response, "X-Custom-Header"). This allows you to do set_redactor(~ redact_headers(., "X-Custom-Header")).