protected override IEnumerable <Diagnostic> Analyze(IFieldSymbol symbol)
{
var invocation = symbol.Name + ".DependencyProperty";
// get fields in same class that are of Type "DependencyProperty" and find out if any gets assigned to the "DependencyProperty" of the "DependencyPropertyKey"
// hint: names should match
var owingType = symbol.FindContainingType();
var dependencyProperties = owingType.GetMembers().OfType <IFieldSymbol>().Where(_ => _.Type.IsDependencyProperty());
return(dependencyProperties.Any(_ => _.GetAssignmentsVia(invocation).Any())
? Enumerable.Empty <Diagnostic>()
: new[] { ReportIssue(symbol) });
}
