public static MemberDeclarationSyntax IConvertibleConvertToSyntax(this PrimitiveDescriptor descriptor, string returnType, string name) => descriptor.IConvertibleConvertToSyntax(IdentifierName(returnType), name);
public static MemberDeclarationSyntax IConvertibleConvertToSyntax(this PrimitiveDescriptor descriptor, SyntaxKind returnType, string name) => descriptor.IConvertibleConvertToSyntax(PredefinedType(Token(returnType)), name);