Mxpanel.HTTPClient.request

You're seeing just the callback request, go back to Mxpanel.HTTPClient module for more information.
Link to this callback

request(method, url, headers, body, opts)

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Specs

request(
  method :: atom(),
  url :: binary(),
  headers :: list(),
  body :: iodata(),
  opts :: Keyword.t()
) ::
  {:ok, %{status: integer(), headers: [{binary(), binary()}], body: binary()}}
  | {:error, term()}

Sends an HTTP request.