https://docs.nvidia.com/holoscan/sdk-user-guide/api/cpp/function_modules_2holoviz_2src_2holoviz_2holoviz_8hpp_1aff70ede3bba69bd297842d1342491072.html
Function holoscan::viz::SetUnicodeCharCallback - NVIDIA Docs
Current version of NVIDIA Holoscan
functionviznvidiadocs