Base:
method
AddExtensionMethodLookupSymbolsInfo
Microsoft.CodeAnalysis.VisualBasic.Microsoft.CodeAnalysis.VisualBasic.Symbols.NamedTypeSymbol.AddExtensionMethodLookupSymbolsInfo(Microsoft.CodeAnalysis.VisualBasic.Microsoft.CodeAnalysis.VisualBasic.LookupSymbolsInfo, Microsoft.CodeAnalysis.VisualBasic.Microsoft.CodeAnalysis.VisualBasic.LookupOptions, Microsoft.CodeAnalysis.VisualBasic.Microsoft.CodeAnalysis.VisualBasic.Binder)