feat(Meta): Determine if an import/export has generated code.
feat(Meta): Determine if an import/export has generated code.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=146418648

chalin/angular2,matanlurey/angular,angulardart/angular,angulardart/angular,angulardart/angular,chalin/angular2,kevmoo/angular,kevmoo/angular,kevmoo/angular,matanlurey/angular,matanlurey/angular,chalin/angular2