Microsoft.CodeAnalysis.IntroduceVariable.AbstractIntroduceVariableService<TService, TExpressionSyntax, TTypeSyntax, TTypeDeclarationSyntax, TQueryExpressionSyntax, TNameSyntax>.IntroduceFieldAsync(Microsoft.CodeAnalysis.SemanticDocument, TExpressionSyntax, System.Boolean, System.Boolean, System.Threading.CancellationToken)