//[MemberNotNull(nameof(_attributeTypeSymbol), nameof(_iNotifyChangedSymbol), nameof(_iNotifyChangingSymbol))]
// Attribute not supported in netstandard 2.0
private CSharpCompilation EnsureSymbolsSet(CSharpCompilation cSharpCompilation)
{
var options = (cSharpCompilation.SyntaxTrees[0].Options as CSharpParseOptions) !;
var compilation = Attributes.AddAttributesToSyntax(cSharpCompilation, options);
// get the newly bound attribute, INotifyPropertyChanging and INotifyPropertyChanged
_observableObjectAttributeSymbol ??= compilation.GetTypeByMetadataNameOrThrow(Attributes._fullObservableObjectAttributeName);
_iNotifyChangedSymbol ??= compilation.GetTypeByMetadataNameOrThrow("System.ComponentModel.INotifyPropertyChanged");
_iNotifyChangingSymbol ??= compilation.GetTypeByMetadataNameOrThrow("System.ComponentModel.INotifyPropertyChanging");
return(compilation);
}
