WhiteRabbit.RPC.call

You're seeing just the function call, go back to WhiteRabbit.RPC module for more information.
Link to this function

call(owner, service, mfa, opts \\ [])

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Specs

call(
  owner :: module(),
  service :: service_rpc(),
  mfa :: {module(), atom(), []},
  options :: Keyword.t()
) :: {:ok, any()} | {:error, any()}