NervesKey.Data.genkey

You're seeing just the function genkey, go back to NervesKey.Data module for more information.
Link to this function

genkey(transport, create? \\ true)

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Specs

genkey(ATECC508A.Transport.t(), boolean()) ::
  {:ok, X509.PublicKey.t()} | {:error, atom()}

Create a public/private key pair

The public key is returned on success. This can only be called on devices that have their configuration locked, but not their data.