T deme's population was steady at 2574 before it changed to 8038 2880.696 generations ago, maintaining that number to the present.
time_units: generations
demes:
  - name: T
    start_time: .inf
    epochs:
      - start_size: 2574
        end_time: 2880.696
      - start_size: 8038
        end_time: 0