tierForRule function

String? tierForRule(
  1. String ruleName
)

Returns the tier name for ruleName, or null if the rule is not registered in any tier set.

Implementation

String? tierForRule(String ruleName) {
  // Build on first access; the tier sets are compile-time constants so
  // this is safe to cache for the process lifetime.
  _tierIndex ??= _buildTierIndex();
  return _tierIndex![ruleName];
}