[Serialization] Add failing test creating extension for nested Type type.
[Serialization] Add failing test creating extension for nested Type type.

gregomni/swift,lorentey/swift,frootloops/swift,gribozavr/swift,harlanhaskins/swift,austinzheng/swift,gribozavr/swift,xwu/swift,hughbe/swift,tinysun212/swift-windows,tjw/swift,apple/swift,atrick/swift,aschwaighofer/swift,shahmishal/swift,hughbe/swift,jmgc/swift,KrishMunot/swift,tkremenek/swift,dduan/swift,SwiftAndroid/swift,bitjammer/swift,brentdax/swift,roambotics/swift,danielmartin/swift,SwiftAndroid/swift,natecook1000/swift,kperryua/swift,tinysun212/swift-windows,devincoughlin/swift,slavapestov/swift,hooman/swift,harlanhaskins/swift,therealbnut/swift,OscarSwanros/swift,aschwaighofer/swift,allevato/swift,harlanhaskins/swift,kstaring/swift,IngmarStein/swift,alblue/swift,kstaring/swift,JaSpa/swift,jopamer/swift,tjw/swift,modocache/swift,jmgc/swift,gmilos/swift,manavgabhawala/swift,jckarter/swift,KrishMunot/swift,ahoppen/swift,xwu/swift,tkremenek/swift,jopamer/swift,roambotics/swift,apple/swift,return/swift,amraboelela/swift,danielmartin/swift,tinysun212/swift-windows,danielmartin/swift,codestergit/swift,IngmarStein/swift,kperryua/swift,russbishop/swift,milseman/swift,sschiau/swift,gribozavr/swift,frootloops/swift,stephentyrone/swift,felix91gr/swift,karwa/swift,ken0nek/swift,therealbnut/swift,tjw/swift,sschiau/swift,xwu/swift,KrishMunot/swift,jmgc/swift,return/swift,lorentey/swift,devincoughlin/swift,jopamer/swift,slavapestov/swift,felix91gr/swift,amraboelela/swift,karwa/swift,kperryua/swift,devincoughlin/swift,jtbandes/swift,shahmishal/swift,alblue/swift,brentdax/swift,arvedviehweger/swift,shajrawi/swift,zisko/swift,parkera/swift,milseman/swift,glessard/swift,karwa/swift,arvedviehweger/swift,xwu/swift,codestergit/swift,rudkx/swift,stephentyrone/swift,shahmishal/swift,dduan/swift,atrick/swift,roambotics/swift,tkremenek/swift,milseman/swift,tkremenek/swift,amraboelela/swift,tjw/swift,brentdax/swift,milseman/swift,shajrawi/swift,nathawes/swift,gregomni/swift,airspeedswift/swift,SwiftAndroid/swift,airspeedswift/swift,gottesmm/swift,huonw/swift,danielmartin/swift,Jnosh/swift,aschwaighofer/swift,SwiftAndroid/swift,swiftix/swift,zisko/swift,jopamer/swift,IngmarStein/swift,OscarSwanros/swift,hooman/swift,practicalswift/swift,airspeedswift/swift,gottesmm/swift,dduan/swift,IngmarStein/swift,stephentyrone/swift,gregomni/swift,CodaFi/swift,ben-ng/swift,hughbe/swift,zisko/swift,karwa/swift,huonw/swift,russbishop/swift,calebd/swift,JGiola/swift,jtbandes/swift,allevato/swift,natecook1000/swift,rudkx/swift,tjw/swift,devincoughlin/swift,calebd/swift,parkera/swift,hooman/swift,allevato/swift,codestergit/swift,tardieu/swift,austinzheng/swift,amraboelela/swift,JaSpa/swift,nathawes/swift,harlanhaskins/swift,jmgc/swift,practicalswift/swift,uasys/swift,swiftix/swift,manavgabhawala/swift,calebd/swift,russbishop/swift,shajrawi/swift,ben-ng/swift,sschiau/swift,slavapestov/swift,frootloops/swift,harlanhaskins/swift,lorentey/swift,SwiftAndroid/swift,tardieu/swift,JaSpa/swift,zisko/swift,xedin/swift,OscarSwanros/swift,djwbrown/swift,tardieu/swift,slavapestov/swift,arvedviehweger/swift,xwu/swift,brentdax/swift,bitjammer/swift,therealbnut/swift,sschiau/swift,alblue/swift,gottesmm/swift,xedin/swift,hooman/swift,jckarter/swift,ben-ng/swift,return/swift,djwbrown/swift,KrishMunot/swift,modocache/swift,johnno1962d/swift,gottesmm/swift,tjw/swift,therealbnut/swift,shahmishal/swift,IngmarStein/swift,kperryua/swift,brentdax/swift,amraboelela/swift,austinzheng/swift,aschwaighofer/swift,shajrawi/swift,natecook1000/swift,jmgc/swift,ben-ng/swift,hughbe/swift,harlanhaskins/swift,glessard/swift,deyton/swift,manavgabhawala/swift,atrick/swift,jckarter/swift,SwiftAndroid/swift,JGiola/swift,swiftix/swift,airspeedswift/swift,tkremenek/swift,ken0nek/swift,Jnosh/swift,KrishMunot/swift,tardieu/swift,ben-ng/swift,manavgabhawala/swift,modocache/swift,gottesmm/swift,OscarSwanros/swift,austinzheng/swift,CodaFi/swift,natecook1000/swift,JGiola/swift,calebd/swift,aschwaighofer/swift,kstaring/swift,gmilos/swift,bitjammer/swift,tinysun212/swift-windows,tardieu/swift,ken0nek/swift,rudkx/swift,jopamer/swift,CodaFi/swift,parkera/swift,shahmishal/swift,apple/swift,xedin/swift,johnno1962d/swift,return/swift,Jnosh/swift,felix91gr/swift,calebd/swift,arvedviehweger/swift,ken0nek/swift,Jnosh/swift,tardieu/swift,milseman/swift,CodaFi/swift,practicalswift/swift,lorentey/swift,JaSpa/swift,shahmishal/swift,sschiau/swift,ahoppen/swift,harlanhaskins/swift,nathawes/swift,natecook1000/swift,IngmarStein/swift,JaSpa/swift,dreamsxin/swift,benlangmuir/swift,tinysun212/swift-windows,devincoughlin/swift,nathawes/swift,gribozavr/swift,parkera/swift,frootloops/swift,practicalswift/swift,benlangmuir/swift,allevato/swift,amraboelela/swift,huonw/swift,ben-ng/swift,tkremenek/swift,parkera/swift,shajrawi/swift,jtbandes/swift,slavapestov/swift,felix91gr/swift,roambotics/swift,modocache/swift,slavapestov/swift,jckarter/swift,practicalswift/swift,airspeedswift/swift,rudkx/swift,xwu/swift,shahmishal/swift,therealbnut/swift,bitjammer/swift,kperryua/swift,rudkx/swift,atrick/swift,rudkx/swift,manavgabhawala/swift,jtbandes/swift,jckarter/swift,atrick/swift,deyton/swift,gregomni/swift,djwbrown/swift,huonw/swift,danielmartin/swift,johnno1962d/swift,xedin/swift,nathawes/swift,ahoppen/swift,ken0nek/swift,natecook1000/swift,uasys/swift,karwa/swift,allevato/swift,arvedviehweger/swift,stephentyrone/swift,karwa/swift,sschiau/swift,deyton/swift,austinzheng/swift,shajrawi/swift,calebd/swift,therealbnut/swift,hooman/swift,tkremenek/swift,huonw/swift,jckarter/swift,airspeedswift/swift,dduan/swift,parkera/swift,milseman/swift,gottesmm/swift,johnno1962d/swift,JGiola/swift,johnno1962d/swift,deyton/swift,alblue/swift,kstaring/swift,aschwaighofer/swift,hughbe/swift,atrick/swift,CodaFi/swift,austinzheng/swift,JaSpa/swift,alblue/swift,sschiau/swift,nathawes/swift,jopamer/swift,codestergit/swift,Jnosh/swift,airspeedswift/swift,glessard/swift,gottesmm/swift,return/swift,stephentyrone/swift,zisko/swift,practicalswift/swift,apple/swift,gmilos/swift,kperryua/swift,swiftix/swift,hooman/swift,codestergit/swift,gregomni/swift,tardieu/swift,djwbrown/swift,JGiola/swift,jmgc/swift,apple/swift,zisko/swift,hooman/swift,tjw/swift,huonw/swift,gmilos/swift,Jnosh/swift,glessard/swift,gmilos/swift,bitjammer/swift,IngmarStein/swift,allevato/swift,roambotics/swift,benlangmuir/swift,glessard/swift,xedin/swift,sschiau/swift,ahoppen/swift,lorentey/swift,arvedviehweger/swift,austinzheng/swift,alblue/swift,apple/swift,CodaFi/swift,parkera/swift,jmgc/swift,stephentyrone/swift,milseman/swift,xedin/swift,russbishop/swift,KrishMunot/swift,kstaring/swift,ahoppen/swift,gribozavr/swift,manavgabhawala/swift,parkera/swift,uasys/swift,codestergit/swift,CodaFi/swift,danielmartin/swift,hughbe/swift,amraboelela/swift,felix91gr/swift,ben-ng/swift,jopamer/swift,devincoughlin/swift,gmilos/swift,bitjammer/swift,djwbrown/swift,ken0nek/swift,arvedviehweger/swift,codestergit/swift,dduan/swift,russbishop/swift,OscarSwanros/swift,aschwaighofer/swift,karwa/swift,swiftix/swift,devincoughlin/swift,KrishMunot/swift,tinysun212/swift-windows,xedin/swift,dduan/swift,dduan/swift,benlangmuir/swift,hughbe/swift,uasys/swift,frootloops/swift,danielmartin/swift,practicalswift/swift,deyton/swift,russbishop/swift,swiftix/swift,xedin/swift,calebd/swift,allevato/swift,return/swift,return/swift,bitjammer/swift,felix91gr/swift,nathawes/swift,shahmishal/swift,lorentey/swift,devincoughlin/swift,frootloops/swift,gribozavr/swift,practicalswift/swift,kstaring/swift,karwa/swift,natecook1000/swift,xwu/swift,tinysun212/swift-windows,jckarter/swift,gregomni/swift,kstaring/swift,Jnosh/swift,brentdax/swift,modocache/swift,gribozavr/swift,lorentey/swift,modocache/swift,jtbandes/swift,uasys/swift,dreamsxin/swift,OscarSwanros/swift,ken0nek/swift,JGiola/swift,SwiftAndroid/swift,therealbnut/swift,shajrawi/swift,felix91gr/swift,gmilos/swift,gribozavr/swift,jtbandes/swift,uasys/swift,shajrawi/swift,russbishop/swift,huonw/swift,alblue/swift,stephentyrone/swift,johnno1962d/swift,ahoppen/swift,deyton/swift,glessard/swift,benlangmuir/swift,deyton/swift,modocache/swift,djwbrown/swift,benlangmuir/swift,johnno1962d/swift,roambotics/swift,lorentey/swift,manavgabhawala/swift,OscarSwanros/swift,djwbrown/swift,slavapestov/swift,uasys/swift,kperryua/swift,frootloops/swift,zisko/swift,swiftix/swift,jtbandes/swift,brentdax/swift,JaSpa/swift