by avoiding making multiple copies of the Primitive2D container that we pass to TransformPrimitive2D. Instead, make TransformPrimitive2D store its children using a GroupPrimitive2D, which means we can share the GroupPrimitive2D among all the TransformPrimitive2D instances we create. Change-Id: I8a4398f9db6a6ab013ee24ad53836975fba6f3df Reviewed-on: https://gerrit.libreoffice.org/c/core/+/162951 Tested-by: Jenkins Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>