span property
Implementation
@override
FileSpan get span {
return arguments
.fold<FileSpan?>(target!.span, (out, a) => out!.expand(a.span!))!
.expand(namedArguments.fold<FileSpan?>(lParen!.span, (out, a) => out!.expand(a.span))!)
.expand(rParen!.span!);
}