Restructure handling to TI messages to enforce exhaustiveness
Restructure handling to TI messages to enforce exhaustiveness

Microsoft/TypeScript,kpreisser/TypeScript,nojvek/TypeScript,SaschaNaz/TypeScript,microsoft/TypeScript,Eyas/TypeScript,microsoft/TypeScript,Eyas/TypeScript,synaptek/TypeScript,basarat/TypeScript,weswigham/TypeScript,Eyas/TypeScript,Microsoft/TypeScript,basarat/TypeScript,synaptek/TypeScript,alexeagle/TypeScript,weswigham/TypeScript,SaschaNaz/TypeScript,basarat/TypeScript,TukekeSoft/TypeScript,donaldpipowitch/TypeScript,kitsonk/TypeScript,synaptek/TypeScript,minestarks/TypeScript,kpreisser/TypeScript,alexeagle/TypeScript,nojvek/TypeScript,nojvek/TypeScript,minestarks/TypeScript,TukekeSoft/TypeScript,minestarks/TypeScript,Microsoft/TypeScript,TukekeSoft/TypeScript,RyanCavanaugh/TypeScript,Eyas/TypeScript,kitsonk/TypeScript,nojvek/TypeScript,donaldpipowitch/TypeScript,SaschaNaz/TypeScript,donaldpipowitch/TypeScript,RyanCavanaugh/TypeScript,weswigham/TypeScript,RyanCavanaugh/TypeScript,SaschaNaz/TypeScript,kitsonk/TypeScript,alexeagle/TypeScript,donaldpipowitch/TypeScript,microsoft/TypeScript,basarat/TypeScript,synaptek/TypeScript,kpreisser/TypeScript