This attribute may be set to one of the following values (also defined in i_pathengine.h):

PE_PinnedShapeType_BurntIn: Shapes with this type will be 'burnt-in' to the mesh, as with iMesh::burnContextIntoMesh(), for inclusion in the mesh based preprocess.
(Note that, in this case, the shape name has no effect.)

PE_PinnedShapeType_NamedObstacle: Shapes with this type will be added to the mesh as 'named obstacles' as with iMesh::storeNamedObstacle().