Base:
method
AddSubStringTokens
Microsoft.CodeAnalysis.CSharp.ConvertBetweenRegularAndVerbatimString.AbstractConvertBetweenRegularAndVerbatimStringCodeRefactoringProvider<TStringExpressionSyntax>.AddSubStringTokens(TStringExpressionSyntax, Microsoft.CodeAnalysis.PooledObjects.ArrayBuilder<Microsoft.CodeAnalysis.SyntaxToken>)