Base:
method
GetExtensionMethods
Microsoft.CodeAnalysis.VisualBasic.Symbols.NamedTypeSymbol.GetExtensionMethods(Microsoft.CodeAnalysis.PooledObjects.ArrayBuilder(Of Microsoft.CodeAnalysis.VisualBasic.Symbols.MethodSymbol), Microsoft.CodeAnalysis.VisualBasic.Symbols.NamespaceSymbol, System.String)