don’t understand your question, can you please provide detailed informantion?
For exmaple,
I like to add in data ==> what kind of data?
How can I populate mask infos during run time and during initialization? ==> seriously depends on what you want to add?
Any sample for that? ==> the ask is not clear, not sure what we should provide. And, did you try to do it by yourself? Any difficulty did you meet?