Tai.Time.monotonic_to_date_time

You're seeing just the function monotonic_to_date_time, go back to Tai.Time module for more information.
Link to this function

monotonic_to_date_time(mono, unit \\ :microsecond, calendar \\ Calendar.ISO)

Specs

monotonic_to_date_time(
  integer(),
  :native | System.time_unit(),
  Calendar.calendar()
) :: {:ok, DateTime.t()} | {:error, atom()}