[ASMapNode] Reduce number of MapKit calls to -cancel by using the .isLoading property.
[ASMapNode] Reduce number of MapKit calls to -cancel by using the .isLoading property.

tomizimobile/AsyncDisplayKit,garrettmoon/AsyncDisplayKit,gazreese/AsyncDisplayKit,levi/AsyncDisplayKit,Adlai-Holler/AsyncDisplayKit,lappp9/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,maicki/AsyncDisplayKit,chrisdanford/AsyncDisplayKit,harryworld/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,gazreese/AsyncDisplayKit,samhsiung/AsyncDisplayKit,facebook/AsyncDisplayKit,smyrgl/AsyncDisplayKit,nrcmedia/AsyncDisplayKit,hannahmbanana/AsyncDisplayKit,chrisdanford/AsyncDisplayKit,chrisdanford/AsyncDisplayKit,facebook/AsyncDisplayKit,maicki/AsyncDisplayKit,levi/AsyncDisplayKit,JetZou/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,george-gw/AsyncDisplayKit,maicki/AsyncDisplayKit,smyrgl/AsyncDisplayKit,nrcmedia/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,marmelroy/AsyncDisplayKit,yufenglv/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,harryworld/AsyncDisplayKit,yufenglv/AsyncDisplayKit,hannahmbanana/AsyncDisplayKit,flovouin/AsyncDisplayKit,nrcmedia/AsyncDisplayKit,Adlai-Holler/AsyncDisplayKit,yufenglv/AsyncDisplayKit,samhsiung/AsyncDisplayKit,rahul-malik/AsyncDisplayKit,lappp9/AsyncDisplayKit,nrcmedia/AsyncDisplayKit,eanagel/AsyncDisplayKit,lappp9/AsyncDisplayKit,samhsiung/AsyncDisplayKit,garrettmoon/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,chrisdanford/AsyncDisplayKit,jellenbogen/AsyncDisplayKit,garrettmoon/AsyncDisplayKit,levi/AsyncDisplayKit,rmls/AsyncDisplayKit,Xinchi/AsyncDisplayKit,rmls/AsyncDisplayKit,levi/AsyncDisplayKit,bimawa/AsyncDisplayKit,Xinchi/AsyncDisplayKit,JetZou/AsyncDisplayKit,smyrgl/AsyncDisplayKit,flovouin/AsyncDisplayKit,george-gw/AsyncDisplayKit,jellenbogen/AsyncDisplayKit,yufenglv/AsyncDisplayKit,JetZou/AsyncDisplayKit,george-gw/AsyncDisplayKit,Xinchi/AsyncDisplayKit,Xinchi/AsyncDisplayKit,eanagel/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,eanagel/AsyncDisplayKit,Xinchi/AsyncDisplayKit,hannahmbanana/AsyncDisplayKit,rmls/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,levi/AsyncDisplayKit,hannahmbanana/AsyncDisplayKit,rahul-malik/AsyncDisplayKit,JetZou/AsyncDisplayKit,rahul-malik/AsyncDisplayKit,marmelroy/AsyncDisplayKit,Adlai-Holler/AsyncDisplayKit,gazreese/AsyncDisplayKit,yufenglv/AsyncDisplayKit,maicki/AsyncDisplayKit,marmelroy/AsyncDisplayKit,facebook/AsyncDisplayKit,romyilano/AsyncDisplayKit,rmls/AsyncDisplayKit,smyrgl/AsyncDisplayKit,lappp9/AsyncDisplayKit,harryworld/AsyncDisplayKit,marmelroy/AsyncDisplayKit,bimawa/AsyncDisplayKit,bimawa/AsyncDisplayKit,eanagel/AsyncDisplayKit,rahul-malik/AsyncDisplayKit,romyilano/AsyncDisplayKit,romyilano/AsyncDisplayKit,maicki/AsyncDisplayKit,Adlai-Holler/AsyncDisplayKit,harryworld/AsyncDisplayKit,bimawa/AsyncDisplayKit,flovouin/AsyncDisplayKit,nrcmedia/AsyncDisplayKit,flovouin/AsyncDisplayKit,romyilano/AsyncDisplayKit,harryworld/AsyncDisplayKit,flovouin/AsyncDisplayKit,garrettmoon/AsyncDisplayKit,jellenbogen/AsyncDisplayKit,eanagel/AsyncDisplayKit,JetZou/AsyncDisplayKit,garrettmoon/AsyncDisplayKit,jellenbogen/AsyncDisplayKit,george-gw/AsyncDisplayKit,rmls/AsyncDisplayKit,samhsiung/AsyncDisplayKit,facebook/AsyncDisplayKit,gazreese/AsyncDisplayKit,Adlai-Holler/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,hannahmbanana/AsyncDisplayKit,jellenbogen/AsyncDisplayKit