Datetime class: Specifying the display format is not supported in code generation.

I need to use 'Format' in datetime like following:

time = datetime('now','Format','HHmmss.SSS')

This outputs: 144426.300

But when I try to use this in SImulink user defined function, I get the following error:

Specifying the display format is not supported in code generation.

Anyone knows how can I get the specific format in code generation? I went through the following page:

https://www.mathworks.com/help/simulink/ug/code-generation-for-datetime-arrays.html

But didn't understand how it helps.

[Walter Roberson]

https://www.mathworks.com/help/coder/ug/datetime-array-limitations-for-code-generation.html