getRuleTagToken method
Is t
{@code (expr
Implementation
RuleTagToken? getRuleTagToken(ParseTree t) {
if (t is RuleNode) {
final r = t;
if (r.childCount == 1 && r.getChild(0) is TerminalNode) {
final c = r.getChild<TerminalNode>(0)! as TerminalNode;
if (c.symbol is RuleTagToken) {
return c.symbol as RuleTagToken;
}
}
}
return null;
}