Imports github.com/Patch2PDF/GDTF-Mesh-Reader/v2 github.com/Patch2PDF/GDTF-Mesh-Reader/v2/pkg/MeshTypes Imports in module “github.com/Patch2PDF/GDTF-Parser” github.com/Patch2PDF/GDTF-Parser github.com/Patch2PDF/GDTF-Parser/examples/stl Standard library imports fmt log os