Add Model#getManagedDisposables() and check if a Disposable already exists before adding.
Add Model#getManagedDisposables() and check if a Disposable already exists before adding.

Badazdz/libgdx,Thotep/libgdx,bgroenks96/libgdx,309746069/libgdx,bladecoder/libgdx,bgroenks96/libgdx,sinistersnare/libgdx,MadcowD/libgdx,collinsmith/libgdx,js78/libgdx,yangweigbh/libgdx,sarkanyi/libgdx,stickyd/libgdx,Xhanim/libgdx,xpenatan/libgdx-LWJGL3,Dzamir/libgdx,kzganesan/libgdx,jberberick/libgdx,anserran/libgdx,hyvas/libgdx,petugez/libgdx,xoppa/libgdx,gf11speed/libgdx,samskivert/libgdx,Zonglin-Li6565/libgdx,thepullman/libgdx,MovingBlocks/libgdx,GreenLightning/libgdx,ryoenji/libgdx,MovingBlocks/libgdx,FyiurAmron/libgdx,kotcrab/libgdx,davebaol/libgdx,JDReutt/libgdx,kagehak/libgdx,stickyd/libgdx,shiweihappy/libgdx,ricardorigodon/libgdx,ttencate/libgdx,alex-dorokhov/libgdx,SidneyXu/libgdx,gf11speed/libgdx,saqsun/libgdx,sarkanyi/libgdx,curtiszimmerman/libgdx,nooone/libgdx,firefly2442/libgdx,xoppa/libgdx,saltares/libgdx,nudelchef/libgdx,fwolff/libgdx,revo09/libgdx,Zonglin-Li6565/libgdx,Heart2009/libgdx,sinistersnare/libgdx,davebaol/libgdx,revo09/libgdx,sjosegarcia/libgdx,NathanSweet/libgdx,ya7lelkom/libgdx,nelsonsilva/libgdx,gdos/libgdx,andyvand/libgdx,josephknight/libgdx,kotcrab/libgdx,MathieuDuponchelle/gdx,designcrumble/libgdx,nrallakis/libgdx,SidneyXu/libgdx,MovingBlocks/libgdx,toloudis/libgdx,andyvand/libgdx,sjosegarcia/libgdx,ricardorigodon/libgdx,shiweihappy/libgdx,xoppa/libgdx,KrisLee/libgdx,ninoalma/libgdx,1yvT0s/libgdx,KrisLee/libgdx,Dzamir/libgdx,stickyd/libgdx,haedri/libgdx-1,1yvT0s/libgdx,kzganesan/libgdx,czyzby/libgdx,Zomby2D/libgdx,MetSystem/libgdx,tommycli/libgdx,nave966/libgdx,xranby/libgdx,Dzamir/libgdx,tommyettinger/libgdx,titovmaxim/libgdx,ricardorigodon/libgdx,Gliby/libgdx,Dzamir/libgdx,SidneyXu/libgdx,GreenLightning/libgdx,josephknight/libgdx,xoppa/libgdx,MetSystem/libgdx,del-sol/libgdx,billgame/libgdx,anserran/libgdx,xpenatan/libgdx-LWJGL3,del-sol/libgdx,czyzby/libgdx,Gliby/libgdx,collinsmith/libgdx,nelsonsilva/libgdx,srwonka/libGdx,ztv/libgdx,NathanSweet/libgdx,js78/libgdx,Deftwun/libgdx,Senth/libgdx,tommyettinger/libgdx,ThiagoGarciaAlves/libgdx,zommuter/libgdx,bsmr-java/libgdx,SidneyXu/libgdx,ninoalma/libgdx,nooone/libgdx,andyvand/libgdx,bgroenks96/libgdx,UnluckyNinja/libgdx,billgame/libgdx,FyiurAmron/libgdx,firefly2442/libgdx,zhimaijoy/libgdx,saqsun/libgdx,mumer92/libgdx,nrallakis/libgdx,xpenatan/libgdx-LWJGL3,luischavez/libgdx,czyzby/libgdx,SidneyXu/libgdx,Thotep/libgdx,josephknight/libgdx,flaiker/libgdx,mumer92/libgdx,shiweihappy/libgdx,youprofit/libgdx,toa5/libgdx,TheAks999/libgdx,noelsison2/libgdx,gouessej/libgdx,designcrumble/libgdx,Senth/libgdx,fwolff/libgdx,realitix/libgdx,zommuter/libgdx,tell10glu/libgdx,fiesensee/libgdx,andyvand/libgdx,bsmr-java/libgdx,del-sol/libgdx,zommuter/libgdx,mumer92/libgdx,fiesensee/libgdx,firefly2442/libgdx,zhimaijoy/libgdx,bladecoder/libgdx,PedroRomanoBarbosa/libgdx,Thotep/libgdx,jberberick/libgdx,ya7lelkom/libgdx,Zomby2D/libgdx,toa5/libgdx,Deftwun/libgdx,samskivert/libgdx,js78/libgdx,UnluckyNinja/libgdx,FredGithub/libgdx,tommycli/libgdx,Zomby2D/libgdx,TheAks999/libgdx,UnluckyNinja/libgdx,bsmr-java/libgdx,davebaol/libgdx,jasonwee/libgdx,tell10glu/libgdx,Zonglin-Li6565/libgdx,junkdog/libgdx,MovingBlocks/libgdx,ya7lelkom/libgdx,andyvand/libgdx,czyzby/libgdx,haedri/libgdx-1,lordjone/libgdx,codepoke/libgdx,youprofit/libgdx,jberberick/libgdx,EsikAntony/libgdx,toa5/libgdx,EsikAntony/libgdx,revo09/libgdx,yangweigbh/libgdx,Xhanim/libgdx,snovak/libgdx,GreenLightning/libgdx,sinistersnare/libgdx,zhimaijoy/libgdx,EsikAntony/libgdx,alex-dorokhov/libgdx,noelsison2/libgdx,zhimaijoy/libgdx,nrallakis/libgdx,ninoalma/libgdx,fiesensee/libgdx,Gliby/libgdx,nudelchef/libgdx,del-sol/libgdx,antag99/libgdx,nrallakis/libgdx,1yvT0s/libgdx,tell10glu/libgdx,copystudy/libgdx,tommyettinger/libgdx,azakhary/libgdx,haedri/libgdx-1,ninoalma/libgdx,copystudy/libgdx,revo09/libgdx,djom20/libgdx,MikkelTAndersen/libgdx,czyzby/libgdx,stickyd/libgdx,youprofit/libgdx,jsjolund/libgdx,Zonglin-Li6565/libgdx,Heart2009/libgdx,alireza-hosseini/libgdx,designcrumble/libgdx,KrisLee/libgdx,cypherdare/libgdx,MadcowD/libgdx,gouessej/libgdx,TheAks999/libgdx,haedri/libgdx-1,kagehak/libgdx,Heart2009/libgdx,gdos/libgdx,titovmaxim/libgdx,curtiszimmerman/libgdx,stinsonga/libgdx,luischavez/libgdx,Zonglin-Li6565/libgdx,thepullman/libgdx,hyvas/libgdx,Badazdz/libgdx,bsmr-java/libgdx,youprofit/libgdx,designcrumble/libgdx,fiesensee/libgdx,Senth/libgdx,mumer92/libgdx,UnluckyNinja/libgdx,titovmaxim/libgdx,FredGithub/libgdx,katiepino/libgdx,billgame/libgdx,fwolff/libgdx,kzganesan/libgdx,shiweihappy/libgdx,stickyd/libgdx,alex-dorokhov/libgdx,sinistersnare/libgdx,sjosegarcia/libgdx,TheAks999/libgdx,srwonka/libGdx,flaiker/libgdx,xranby/libgdx,ricardorigodon/libgdx,sarkanyi/libgdx,djom20/libgdx,srwonka/libGdx,MovingBlocks/libgdx,SidneyXu/libgdx,kotcrab/libgdx,samskivert/libgdx,kagehak/libgdx,cypherdare/libgdx,lordjone/libgdx,MadcowD/libgdx,petugez/libgdx,fiesensee/libgdx,junkdog/libgdx,srwonka/libGdx,billgame/libgdx,petugez/libgdx,stinsonga/libgdx,1yvT0s/libgdx,toloudis/libgdx,kotcrab/libgdx,petugez/libgdx,UnluckyNinja/libgdx,sjosegarcia/libgdx,curtiszimmerman/libgdx,Gliby/libgdx,gouessej/libgdx,jsjolund/libgdx,kzganesan/libgdx,josephknight/libgdx,tommycli/libgdx,tommycli/libgdx,collinsmith/libgdx,FredGithub/libgdx,KrisLee/libgdx,sarkanyi/libgdx,Senth/libgdx,anserran/libgdx,czyzby/libgdx,lordjone/libgdx,gouessej/libgdx,mumer92/libgdx,Senth/libgdx,tommycli/libgdx,xranby/libgdx,ThiagoGarciaAlves/libgdx,stinsonga/libgdx,stickyd/libgdx,toa5/libgdx,katiepino/libgdx,srwonka/libGdx,sinistersnare/libgdx,titovmaxim/libgdx,stickyd/libgdx,nudelchef/libgdx,samskivert/libgdx,GreenLightning/libgdx,xranby/libgdx,saltares/libgdx,BlueRiverInteractive/libgdx,MathieuDuponchelle/gdx,309746069/libgdx,Gliby/libgdx,MadcowD/libgdx,sjosegarcia/libgdx,codepoke/libgdx,sinistersnare/libgdx,bgroenks96/libgdx,junkdog/libgdx,UnluckyNinja/libgdx,antag99/libgdx,MathieuDuponchelle/gdx,Xhanim/libgdx,andyvand/libgdx,anserran/libgdx,realitix/libgdx,BlueRiverInteractive/libgdx,bgroenks96/libgdx,youprofit/libgdx,MathieuDuponchelle/gdx,NathanSweet/libgdx,toa5/libgdx,lordjone/libgdx,xoppa/libgdx,billgame/libgdx,nave966/libgdx,shiweihappy/libgdx,Gliby/libgdx,zhimaijoy/libgdx,jberberick/libgdx,alireza-hosseini/libgdx,fwolff/libgdx,tommycli/libgdx,azakhary/libgdx,srwonka/libGdx,NathanSweet/libgdx,firefly2442/libgdx,flaiker/libgdx,titovmaxim/libgdx,copystudy/libgdx,snovak/libgdx,petugez/libgdx,toloudis/libgdx,ttencate/libgdx,MikkelTAndersen/libgdx,copystudy/libgdx,MovingBlocks/libgdx,ztv/libgdx,FredGithub/libgdx,MathieuDuponchelle/gdx,EsikAntony/libgdx,BlueRiverInteractive/libgdx,andyvand/libgdx,FyiurAmron/libgdx,czyzby/libgdx,Thotep/libgdx,JFixby/libgdx,ya7lelkom/libgdx,Arcnor/libgdx,ya7lelkom/libgdx,kagehak/libgdx,junkdog/libgdx,UnluckyNinja/libgdx,noelsison2/libgdx,gouessej/libgdx,jsjolund/libgdx,katiepino/libgdx,junkdog/libgdx,Arcnor/libgdx,GreenLightning/libgdx,Xhanim/libgdx,sarkanyi/libgdx,ninoalma/libgdx,gdos/libgdx,nrallakis/libgdx,PedroRomanoBarbosa/libgdx,JFixby/libgdx,gdos/libgdx,gouessej/libgdx,djom20/libgdx,josephknight/libgdx,billgame/libgdx,flaiker/libgdx,Heart2009/libgdx,UnluckyNinja/libgdx,MathieuDuponchelle/gdx,alireza-hosseini/libgdx,Deftwun/libgdx,curtiszimmerman/libgdx,luischavez/libgdx,zommuter/libgdx,toloudis/libgdx,MathieuDuponchelle/gdx,codepoke/libgdx,Zomby2D/libgdx,jsjolund/libgdx,josephknight/libgdx,designcrumble/libgdx,ryoenji/libgdx,Wisienkas/libgdx,basherone/libgdxcn,designcrumble/libgdx,toa5/libgdx,saqsun/libgdx,EsikAntony/libgdx,alireza-hosseini/libgdx,FredGithub/libgdx,MikkelTAndersen/libgdx,antag99/libgdx,antag99/libgdx,davebaol/libgdx,ryoenji/libgdx,Badazdz/libgdx,realitix/libgdx,shiweihappy/libgdx,ztv/libgdx,alireza-hosseini/libgdx,jasonwee/libgdx,bladecoder/libgdx,jasonwee/libgdx,samskivert/libgdx,ryoenji/libgdx,codepoke/libgdx,luischavez/libgdx,alex-dorokhov/libgdx,MetSystem/libgdx,billgame/libgdx,Xhanim/libgdx,TheAks999/libgdx,bladecoder/libgdx,NathanSweet/libgdx,hyvas/libgdx,czyzby/libgdx,zhimaijoy/libgdx,libgdx/libgdx,junkdog/libgdx,xpenatan/libgdx-LWJGL3,js78/libgdx,Thotep/libgdx,djom20/libgdx,MetSystem/libgdx,Xhanim/libgdx,FredGithub/libgdx,PedroRomanoBarbosa/libgdx,GreenLightning/libgdx,ThiagoGarciaAlves/libgdx,antag99/libgdx,ttencate/libgdx,firefly2442/libgdx,jberberick/libgdx,ya7lelkom/libgdx,ttencate/libgdx,bgroenks96/libgdx,firefly2442/libgdx,MetSystem/libgdx,EsikAntony/libgdx,del-sol/libgdx,saqsun/libgdx,saltares/libgdx,jberberick/libgdx,MetSystem/libgdx,revo09/libgdx,antag99/libgdx,yangweigbh/libgdx,xranby/libgdx,Heart2009/libgdx,TheAks999/libgdx,snovak/libgdx,309746069/libgdx,Wisienkas/libgdx,yangweigbh/libgdx,del-sol/libgdx,EsikAntony/libgdx,js78/libgdx,curtiszimmerman/libgdx,Xhanim/libgdx,alex-dorokhov/libgdx,jasonwee/libgdx,bgroenks96/libgdx,Arcnor/libgdx,FredGithub/libgdx,TheAks999/libgdx,tommycli/libgdx,ttencate/libgdx,jasonwee/libgdx,flaiker/libgdx,tell10glu/libgdx,azakhary/libgdx,alireza-hosseini/libgdx,collinsmith/libgdx,hyvas/libgdx,antag99/libgdx,saltares/libgdx,fwolff/libgdx,nave966/libgdx,thepullman/libgdx,BlueRiverInteractive/libgdx,fwolff/libgdx,PedroRomanoBarbosa/libgdx,xpenatan/libgdx-LWJGL3,Deftwun/libgdx,Senth/libgdx,toloudis/libgdx,Senth/libgdx,xoppa/libgdx,Wisienkas/libgdx,collinsmith/libgdx,luischavez/libgdx,Thotep/libgdx,tommycli/libgdx,snovak/libgdx,ThiagoGarciaAlves/libgdx,Xhanim/libgdx,KrisLee/libgdx,GreenLightning/libgdx,JDReutt/libgdx,copystudy/libgdx,MetSystem/libgdx,MadcowD/libgdx,saqsun/libgdx,1yvT0s/libgdx,haedri/libgdx-1,Gliby/libgdx,kzganesan/libgdx,MovingBlocks/libgdx,JDReutt/libgdx,ztv/libgdx,copystudy/libgdx,djom20/libgdx,JFixby/libgdx,JDReutt/libgdx,tell10glu/libgdx,MadcowD/libgdx,realitix/libgdx,azakhary/libgdx,kagehak/libgdx,yangweigbh/libgdx,josephknight/libgdx,designcrumble/libgdx,ya7lelkom/libgdx,ThiagoGarciaAlves/libgdx,gf11speed/libgdx,tell10glu/libgdx,petugez/libgdx,gf11speed/libgdx,junkdog/libgdx,JFixby/libgdx,sjosegarcia/libgdx,katiepino/libgdx,haedri/libgdx-1,gf11speed/libgdx,ztv/libgdx,bsmr-java/libgdx,thepullman/libgdx,Zonglin-Li6565/libgdx,anserran/libgdx,Zonglin-Li6565/libgdx,1yvT0s/libgdx,MathieuDuponchelle/gdx,jsjolund/libgdx,thepullman/libgdx,309746069/libgdx,gdos/libgdx,ninoalma/libgdx,srwonka/libGdx,ricardorigodon/libgdx,kagehak/libgdx,FyiurAmron/libgdx,youprofit/libgdx,nave966/libgdx,snovak/libgdx,haedri/libgdx-1,MovingBlocks/libgdx,xpenatan/libgdx-LWJGL3,Deftwun/libgdx,fiesensee/libgdx,anserran/libgdx,JFixby/libgdx,alireza-hosseini/libgdx,lordjone/libgdx,petugez/libgdx,cypherdare/libgdx,Thotep/libgdx,xoppa/libgdx,MikkelTAndersen/libgdx,kotcrab/libgdx,libgdx/libgdx,titovmaxim/libgdx,nudelchef/libgdx,Badazdz/libgdx,zhimaijoy/libgdx,djom20/libgdx,designcrumble/libgdx,js78/libgdx,BlueRiverInteractive/libgdx,flaiker/libgdx,saltares/libgdx,saltares/libgdx,djom20/libgdx,alex-dorokhov/libgdx,tommyettinger/libgdx,basherone/libgdxcn,firefly2442/libgdx,sjosegarcia/libgdx,jasonwee/libgdx,EsikAntony/libgdx,ricardorigodon/libgdx,Heart2009/libgdx,titovmaxim/libgdx,ricardorigodon/libgdx,ninoalma/libgdx,collinsmith/libgdx,Wisienkas/libgdx,sjosegarcia/libgdx,curtiszimmerman/libgdx,noelsison2/libgdx,antag99/libgdx,nudelchef/libgdx,fwolff/libgdx,kotcrab/libgdx,youprofit/libgdx,JFixby/libgdx,ryoenji/libgdx,nelsonsilva/libgdx,xranby/libgdx,js78/libgdx,noelsison2/libgdx,gf11speed/libgdx,MikkelTAndersen/libgdx,snovak/libgdx,ninoalma/libgdx,toa5/libgdx,lordjone/libgdx,basherone/libgdxcn,gdos/libgdx,ryoenji/libgdx,fiesensee/libgdx,Arcnor/libgdx,libgdx/libgdx,yangweigbh/libgdx,codepoke/libgdx,Badazdz/libgdx,billgame/libgdx,codepoke/libgdx,nelsonsilva/libgdx,309746069/libgdx,309746069/libgdx,ztv/libgdx,xoppa/libgdx,Dzamir/libgdx,shiweihappy/libgdx,katiepino/libgdx,GreenLightning/libgdx,ricardorigodon/libgdx,basherone/libgdxcn,yangweigbh/libgdx,del-sol/libgdx,jasonwee/libgdx,samskivert/libgdx,copystudy/libgdx,toloudis/libgdx,titovmaxim/libgdx,Heart2009/libgdx,jsjolund/libgdx,Wisienkas/libgdx,BlueRiverInteractive/libgdx,ThiagoGarciaAlves/libgdx,Deftwun/libgdx,katiepino/libgdx,FyiurAmron/libgdx,ryoenji/libgdx,MikkelTAndersen/libgdx,jsjolund/libgdx,zommuter/libgdx,firefly2442/libgdx,nudelchef/libgdx,JFixby/libgdx,js78/libgdx,KrisLee/libgdx,noelsison2/libgdx,realitix/libgdx,josephknight/libgdx,MikkelTAndersen/libgdx,MikkelTAndersen/libgdx,zommuter/libgdx,basherone/libgdxcn,1yvT0s/libgdx,tommyettinger/libgdx,saqsun/libgdx,realitix/libgdx,flaiker/libgdx,JDReutt/libgdx,nave966/libgdx,nooone/libgdx,bsmr-java/libgdx,nrallakis/libgdx,FyiurAmron/libgdx,hyvas/libgdx,saqsun/libgdx,Thotep/libgdx,bgroenks96/libgdx,stickyd/libgdx,Badazdz/libgdx,fwolff/libgdx,zommuter/libgdx,del-sol/libgdx,thepullman/libgdx,MadcowD/libgdx,gf11speed/libgdx,nudelchef/libgdx,Senth/libgdx,FredGithub/libgdx,MathieuDuponchelle/gdx,nrallakis/libgdx,Deftwun/libgdx,junkdog/libgdx,Wisienkas/libgdx,collinsmith/libgdx,gouessej/libgdx,kotcrab/libgdx,fiesensee/libgdx,kzganesan/libgdx,saqsun/libgdx,FyiurAmron/libgdx,hyvas/libgdx,realitix/libgdx,davebaol/libgdx,flaiker/libgdx,JDReutt/libgdx,sarkanyi/libgdx,stinsonga/libgdx,saltares/libgdx,PedroRomanoBarbosa/libgdx,jberberick/libgdx,Arcnor/libgdx,anserran/libgdx,xranby/libgdx,ztv/libgdx,katiepino/libgdx,Wisienkas/libgdx,curtiszimmerman/libgdx,gouessej/libgdx,katiepino/libgdx,nave966/libgdx,Dzamir/libgdx,alex-dorokhov/libgdx,bsmr-java/libgdx,gdos/libgdx,MadcowD/libgdx,bladecoder/libgdx,PedroRomanoBarbosa/libgdx,codepoke/libgdx,Zomby2D/libgdx,gdos/libgdx,libgdx/libgdx,ttencate/libgdx,kagehak/libgdx,Arcnor/libgdx,copystudy/libgdx,toloudis/libgdx,toa5/libgdx,Zonglin-Li6565/libgdx,curtiszimmerman/libgdx,cypherdare/libgdx,FyiurAmron/libgdx,ttencate/libgdx,shiweihappy/libgdx,ThiagoGarciaAlves/libgdx,yangweigbh/libgdx,kagehak/libgdx,alex-dorokhov/libgdx,Wisienkas/libgdx,PedroRomanoBarbosa/libgdx,Gliby/libgdx,luischavez/libgdx,andyvand/libgdx,zhimaijoy/libgdx,basherone/libgdxcn,gf11speed/libgdx,samskivert/libgdx,KrisLee/libgdx,mumer92/libgdx,thepullman/libgdx,309746069/libgdx,TheAks999/libgdx,saltares/libgdx,Dzamir/libgdx,collinsmith/libgdx,luischavez/libgdx,snovak/libgdx,tell10glu/libgdx,nudelchef/libgdx,nelsonsilva/libgdx,Badazdz/libgdx,Heart2009/libgdx,309746069/libgdx,azakhary/libgdx,ttencate/libgdx,BlueRiverInteractive/libgdx,lordjone/libgdx,jsjolund/libgdx,sarkanyi/libgdx,ya7lelkom/libgdx,noelsison2/libgdx,snovak/libgdx,noelsison2/libgdx,srwonka/libGdx,MetSystem/libgdx,nelsonsilva/libgdx,Deftwun/libgdx,SidneyXu/libgdx,nave966/libgdx,PedroRomanoBarbosa/libgdx,SidneyXu/libgdx,petugez/libgdx,KrisLee/libgdx,JFixby/libgdx,revo09/libgdx,thepullman/libgdx,JDReutt/libgdx,nooone/libgdx,kotcrab/libgdx,azakhary/libgdx,sarkanyi/libgdx,realitix/libgdx,1yvT0s/libgdx,libgdx/libgdx,kzganesan/libgdx,lordjone/libgdx,Badazdz/libgdx,mumer92/libgdx,zommuter/libgdx,jberberick/libgdx,revo09/libgdx,codepoke/libgdx,toloudis/libgdx,anserran/libgdx,xpenatan/libgdx-LWJGL3,stinsonga/libgdx,BlueRiverInteractive/libgdx,tell10glu/libgdx,JDReutt/libgdx,nooone/libgdx,hyvas/libgdx,bsmr-java/libgdx,samskivert/libgdx,xranby/libgdx,xpenatan/libgdx-LWJGL3,jasonwee/libgdx,mumer92/libgdx,nrallakis/libgdx,davebaol/libgdx,alireza-hosseini/libgdx,luischavez/libgdx,ThiagoGarciaAlves/libgdx,revo09/libgdx,Dzamir/libgdx,youprofit/libgdx,hyvas/libgdx,haedri/libgdx-1,cypherdare/libgdx,ztv/libgdx,nooone/libgdx,djom20/libgdx,nave966/libgdx