private static void AddInvocation(
HelpBuilder builder,
IReadOnlyCollection <ISymbol> symbols,
Func <ISymbol, HelpItem> formatter)
{
if (symbols?.Any() != true)
{
return;
}
var helpItems = symbols
.Select(formatter).ToList();
var maxWidth = helpItems
.Select(line => line.Invocation.Length)
.OrderByDescending(textLength => textLength)
.First();
foreach (var helpItem in helpItems)
{
builder.AppendHelpItem(helpItem, maxWidth);
}
}