Check constraints deeply on singleton types.
Check constraints deeply on singleton types.

weswigham/TypeScript,kitsonk/TypeScript,SaschaNaz/TypeScript,Microsoft/TypeScript,RyanCavanaugh/TypeScript,kpreisser/TypeScript,microsoft/TypeScript,Microsoft/TypeScript,kpreisser/TypeScript,SaschaNaz/TypeScript,microsoft/TypeScript,kitsonk/TypeScript,SaschaNaz/TypeScript,Microsoft/TypeScript,kitsonk/TypeScript,microsoft/TypeScript,weswigham/TypeScript,RyanCavanaugh/TypeScript,RyanCavanaugh/TypeScript,weswigham/TypeScript,SaschaNaz/TypeScript,kpreisser/TypeScript