Replace _.has() method with more generic check
Replace _.has() method with more generic check

abduld/dagre,cpettitt/dagre,kdawes/dagre,lmcorbo/dagre,shelsonjava/dagre,9n/dagre,lmcorbo/dagre,GerHobbelt/dagre,kdawes/dagre,shelsonjava/dagre,abduld/dagre,tylingsoft/dagre-layout,tylingsoft/dagre-layout,9n/dagre,abduld/dagre,cpettitt/dagre,kdawes/dagre,lmcorbo/dagre,GerHobbelt/dagre,shelsonjava/dagre,9n/dagre,cpettitt/dagre,GerHobbelt/dagre