Sim.step: def of bend-lawful-stdlib@0.1.0.0
Import: import bend-lawful-stdlib@0.1.0.0/src/sim.bend as Sim
Lines 21-25 of bend-lawful-stdlib@0.1.0.0/src/sim.bend: https://jend.leeeet.dev/read.txt?path=bend-lawful-stdlib@0.1.0.0/src/sim.bend&start_line=21&end_line=25

import Base
import bend-lawful-stdlib@0.1.0.0/src/class.bend as C

def step(~P: Data, ~g: C.Group<P>, ~F: P -> P, s: State<P>) -> State<P>:
  match s:
    case State{+x, v}:
      +w = C.Group.add(P, g, v, F(x))
      State{C.Group.add(P, g, x, w), w}

Uses (3):
  https://jend.leeeet.dev/definition.txt?path=bend-lawful-stdlib@0.1.0.0/src/class.bend&name=Group
  https://jend.leeeet.dev/definition.txt?path=bend-lawful-stdlib@0.1.0.0/src/class.bend&name=Group.add
  https://jend.leeeet.dev/definition.txt?path=bend-lawful-stdlib@0.1.0.0/src/sim.bend&name=State