protected override ISyntaxVisitorAction Leave(
OperationDefinitionNode node,
IDocumentValidatorContext context)
{
if (context.FieldSets.Count > 0)
{
TryMergeFieldsInSet(context, context.FieldSets[node.SelectionSet]);
}
if (node.SelectionSet.Selections.Count == 0)
{
context.Errors.Add(context.NoSelectionOnRootType(
node,
context.Schema.GetOperationType(node.Operation)));
}
return(base.Leave(node, context));
}