Circuits.GPIO.Chip.get_line_info

You're seeing just the function get_line_info, go back to Circuits.GPIO.Chip module for more information.
Link to this function

get_line_info(chip, offset)

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Specs

get_line_info(t(), offset()) ::
  {:ok, Circuits.GPIO.Chip.LineInfo.t()} | {:error, atom()}

Getting information about a line