Method AddContextHook

imgui_tiny_app/imgui/imgui.cpp:4634–4641

No specific ordering/dependency support, will see as needed

// No specific ordering/dependency support, will see as needed
ImGuiID ImGui::AddContextHook(ImGuiContext* ctx, const ImGuiContextHook* hook)
{
    ImGuiContext& g = *ctx;
    IM_ASSERT(hook->Callback != NULL && hook->HookId == 0 && hook->Type != ImGuiContextHookType_PendingRemoval_);
    g.Hooks.push_back(*hook);
    g.Hooks.back().HookId = ++g.HookIdNext;
    return g.HookIdNext;
}

// Deferred removal, avoiding issue with changing vector while iterating it
void ImGui::RemoveContextHook(ImGuiContext* ctx, ImGuiID hook_id)