clang ast visitor for single line multiple variable declaration

I am new to Clang libTooling development.

consider the following variable declaration

int i, j, k = 10;
^              ^  

For my project requirement, I want to capture the whole declaration expression including "i", "j" and "k".

How to capture the complete declaration expression including all variables with clang libTooling?

What I am experiencing is that I do not get the visitor for complete expression instead I get the visitor for individual variable declaration.

Is this the expected behavior in clang libTooling OR am I missing something?

Please suggest me the correct way to capture single line multiple declarations or any workaround? Any kind of help will be really appreciated.

Thanks, Hemant