private void ValidateDirectiveAreUniquePerLocation <T>(
T node,
IDocumentValidatorContext context)
where T : ISyntaxNode, Language.IHasDirectives
{
context.Names.Clear();
foreach (DirectiveNode directive in node.Directives)
{
if (context.Schema.TryGetDirectiveType(directive.Name.Value, out DirectiveType? dt) &&
!dt.IsRepeatable &&
!context.Names.Add(directive.Name.Value))
{
context.Errors.Add(context.DirectiveMustBeUniqueInLocation(directive));
}
}
}