Types and classes in the GeometricObjects module?

Dear community,

I am getting a bit of a headache when trying to use types and classes from the GeometricObjects plugin or namespace.

For instance, I would like to use the TPointHashGrid3 type in my C++ code. However, upon compiling I am getting the error "Unable to find 'class', 'delegate', 'enum', or 'struct' with name 'TPointHashGrid3'".

What surprises me, is that GeometricObjects is listed as a Plugin but does neither appear in the Editor’s Plugin Settings nor does the Build.cs accept it in the ModuleDependencies.

Can somebody help me out here please?