private static ISet <string> GetNames(Declaration declaration, Predicate <Declaration> predicate)
{
var set = new HashSet <string>();
var stack = new Stack <Declaration>();
stack.Push(declaration);
while (stack.Count > 0)
{
var current = stack.Pop();
if (current == null)
{
continue;
}
if (predicate(current))
{
set.Add(current.Name);
}
foreach (var child in current.Children)
{
stack.Push(child);
}
}
return(SpecializedCollections.ReadOnlySet(set));
}
