use interface for ValidVariableDeclaration
use interface for ValidVariableDeclaration

Microsoft/TypeScript,SaschaNaz/TypeScript,kitsonk/TypeScript,alexeagle/TypeScript,microsoft/TypeScript,microsoft/TypeScript,weswigham/TypeScript,RyanCavanaugh/TypeScript,RyanCavanaugh/TypeScript,Microsoft/TypeScript,nojvek/TypeScript,alexeagle/TypeScript,kitsonk/TypeScript,minestarks/TypeScript,kpreisser/TypeScript,kpreisser/TypeScript,nojvek/TypeScript,SaschaNaz/TypeScript,alexeagle/TypeScript,SaschaNaz/TypeScript,kpreisser/TypeScript,RyanCavanaugh/TypeScript,nojvek/TypeScript,minestarks/TypeScript,kitsonk/TypeScript,microsoft/TypeScript,Microsoft/TypeScript,nojvek/TypeScript,SaschaNaz/TypeScript,minestarks/TypeScript,weswigham/TypeScript,weswigham/TypeScript