Currently, all of the types we import into Ghidra are placed in a "df" category, and the only subcategories are "enums" and "vtables" (itself with a "methods" subcategory).
There are several more categories we can create to keep things better organized (and to make it quicker to locate types):
- arrays
- bitfields
- BitArrays
- structs (and classes)
- typedefs
- unions
- vectors