String OutputGraph(TraverseFunc traverseFunc, SymbolContext <SymbolT, CtxKey> ctx,
int depth, int maxh, bool symbs)
{
string text = (symbs ? ctx.ListContext() : ctx.ToString());
text = String.Concat(Enumerable.Repeat(" ", depth)) + text + Environment.NewLine;
if (maxh > 0)
{
foreach (var p in traverseFunc(ctx))
{
text += OutputGraph(traverseFunc, p, depth + 1, maxh - 1, symbs);
}
}
return(text);
}