A particular type of type, used by VectorGraphics, similar to SelfInitializingType.
The object GraphicsType is a type, with ancestor classes Type < MutableHashTable < HashTable < Thing.
The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/VectorGraphics.m2:1875:0.