Base:
method
GetSpeculativeSemanticModel
Microsoft.CodeAnalysis.Simplification.AbstractSimplificationService<TCompilationUnitSyntax, TExpressionSyntax, TStatementSyntax, TCrefSyntax>.GetSpeculativeSemanticModel(ref Microsoft.CodeAnalysis.SyntaxNode, Microsoft.CodeAnalysis.SemanticModel, Microsoft.CodeAnalysis.SyntaxNode)