How to declare collision groups in Rojo?

I’m currently using Rojo with VSCode and am trying to declare collision groups in default.project.json.
Does anyone know how to do this, because it seems possible by looking at the build.rbxlx file?

Isnt there an easy way of doing it? cuz theres a button called collision groups in studio. I dont think you gotta mess with the json stuff man

I’m trying to automate this, because I plan on having multiple place files using Rojo and don’t like repeating changes to all of them whenever I wish to mess with collision groups.

In the file it shows

    <External>null</External>

    <External>nil</External>

    <Item class="Workspace" referent="21">

        <Properties>

            <bool name="AllowThirdPartySales">false</bool>

            <token name="AnimationWeightedBlendFix">0</token>

            <BinaryString name="AttributesSerialize"></BinaryString>

            <token name="ClientAnimatorThrottling">0</token>

            <string name="CollisionGroups">Default^0^-1\New Group^1^-1</string>

            <Ref name="CurrentCamera">RBXB326F0367F1B4D1A825886B2B9F0C374</Ref>

I was thinking that this would be possible using rojo.