registerRuleSeverities static method
Register the severity of each active rule so the shed mechanism can filter by severity without instantiating rules at shedding time. Called once at plugin startup after rule registration.
severities maps lower-case rule names to their DiagnosticSeverity
index (INFO=0, WARNING=1, ERROR=2).
Implementation
static void registerRuleSeverities(Map<String, int> severities) {
_ruleSeverityIndex
..clear()
..addAll(severities);
}