Imports go-hep.org/x/hep/fwk/utils/errstack github.com/awalterschulze/gographviz go-hep.org/x/hep/hbook go-hep.org/x/hep/fwk/fsm go-hep.org/x/hep/fwk/utils/tarjan Standard library imports bytes context fmt io io/ioutil math os reflect runtime sort time