extensions/git/src/decorationProvider.ts/GitDecorations/enable
class GitDecorations:	private enable(): void {
		this.model.onDidOpenRepository(this.onDidOpenRepository, this, this.modelDisposables);
		this.model.onDidCloseRepository(this.onDidCloseRepository, this, this.modelDisposables);
		this.model.repositories.forEach(this.onDidOpenRepository, this);
	}