• Vanilla
• AnMiTech
• Bricklayers
• Creatures and Critters
• DSDebarkedLogs
• Fancy Doors
• Lichen
• Primitive Survival
• Pack Animals
• Shingles And The Things
• Vies Blocks
• ViesCraft
• Wildcraft
• Wild Farming
• xrowboat
• Zeekea

groupBy is case-sensitive

Group a certain item:

"attributes": {
"handbook": { "groupBy": ["fruitpress-*"] }
}

Group separately, use for variantgroups from the most below example:

"groupBy": ["table-*-{type}"]

Group a few items from different mods:

"groupBy": ["table-*-{type}", "vanvar:table-*-{type}"]

variantgroups example:

{ "code": "material", "states": ["aged"], "loadFromProperties": "block/wood" },
{ "code": "type", "states": [ "normal", "whitemarble", "redmarble", "greenmarble" ] }