text: #include "simulation.hpp"
  
  #include "gui.hpp"
  #include "icons.hpp"
  
  void gui_sim(simulation& sim) {
      if (gui_tree(fmt::format("{} Settings", icon_gear))) {
          with_item_width width(120.0f);
          gui_input_double("End time",  sim.until, "ms");
          gui_input_double("Time step", sim.dt,    "ms");
          ImGui::TreePop();
      }
  }
  