Add initialization callback section to the playground.
Add initialization callback section to the playground.

yoichitgy/Swinject,jondwillis/Swinject,yoichitgy/Swinject,Swinject/Swinject,jondwillis/Swinject,Swinject/Swinject,yoichitgy/Swinject,jondwillis/Swinject,Swinject/Swinject,jondwillis/Swinject,yoichitgy/Swinject,Swinject/Swinject