setMetricsTracer method
Sets the metrics tracer for this bus
Implementation
void setMetricsTracer(MetricsTracer tracer) {
_metricsTracer = tracer;
_wildcard._metricsTracer = tracer;
// Update existing nodes with the new tracer
for (final node in _nodes.values) {
node.metricsTracer = tracer;
}
}