text: //-----------------------------------------------------------------------------
  // USER IMPLEMENTATION
  // This file contains compile-time options for ImGui.
  // Other options (memory allocation overrides, callbacks, etc.) can be set at runtime via the ImGuiIO structure - ImGui::GetIO().
  //-----------------------------------------------------------------------------
  
  #pragma once
  
  //---- Define assertion handler. Defaults to calling assert().
  //#define IM_ASSERT(_EXPR)  MyAssert(_EXPR)
  
  //---- Define attributes of all API symbols declarations, e.g. for DLL under Windows.
  //#define IMGUI_API __declspec( dllexport )
  //#define IMGUI_API __declspec( dllimport )
  
  //---- Include imgui_user.inl at the end of imgui.cpp so you can include code that extends ImGui using its private data/functions.
  //#define IMGUI_INCLUDE_IMGUI_USER_INL
  
  //---- Include imgui_user.h at the end of imgui.h
  //#define IMGUI_INCLUDE_IMGUI_USER_H
  
  //---- Don't implement default handlers for Windows (so as not to link with OpenClipboard() and others Win32 functions)
  //#define IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCS
  //#define IMGUI_DISABLE_WIN32_DEFAULT_IME_FUNCS
  
  //---- Don't implement help and test window functionality (ShowUserGuide()/ShowStyleEditor()/ShowTestWindow() methods will be empty)
  //#define IMGUI_DISABLE_TEST_WINDOWS
  
  //---- Don't define obsolete functions names
  //#define IMGUI_DISABLE_OBSOLETE_FUNCTIONS
  
  //---- Implement STB libraries in a namespace to avoid conflicts
  //#define IMGUI_STB_NAMESPACE     ImGuiStb
  
  //---- Define constructor and implicit cast operators to convert back<>forth from your math types and ImVec2/ImVec4.
  /*
  #define IM_VEC2_CLASS_EXTRA                                                 \
          ImVec2(const MyVec2& f) { x = f.x; y = f.y; }                       \
          operator MyVec2() const { return MyVec2(x,y); }
  
  #define IM_VEC4_CLASS_EXTRA                                                 \
          ImVec4(const MyVec4& f) { x = f.x; y = f.y; z = f.z; w = f.w; }     \
          operator MyVec4() const { return MyVec4(x,y,z,w); }
  */
  
  //---- Freely implement extra functions within the ImGui:: namespace.
  //---- Declare helpers or widgets implemented in imgui_user.inl or elsewhere, so end-user doesn't need to include multiple files.
  //---- e.g. you can create variants of the ImGui::Value() helper for your low-level math types, or your own widgets/helpers.
  /*
  namespace ImGui
  {
      void    Value(const char* prefix, const MyVec2& v, const char* float_format = NULL);
      void    Value(const char* prefix, const MyVec4& v, const char* float_format = NULL);
  }
  */
  
  #define ImDrawIdx unsigned int
  