Microsoft.CodeAnalysis.VisualBasic.Microsoft.CodeAnalysis.VisualBasic.Symbols.NamespaceSymbol.AddExtensionMethodLookupSymbolsInfo(Microsoft.CodeAnalysis.VisualBasic.Microsoft.CodeAnalysis.VisualBasic.LookupSymbolsInfo, Microsoft.CodeAnalysis.VisualBasic.Microsoft.CodeAnalysis.VisualBasic.LookupOptions, Microsoft.CodeAnalysis.VisualBasic.Microsoft.CodeAnalysis.VisualBasic.Binder, Microsoft.CodeAnalysis.VisualBasic.Microsoft.CodeAnalysis.VisualBasic.Symbols.NamespaceSymbol)