public boolean removeMetricCollector(final IGangliaMetricsCollector c){
  if (c == null)   throw new IllegalArgumentException();
  return metricCollectors.remove(c);
}

public boolean removeMetricCollector ( final IGangliaMetricsCollector c ) { if ( c == null ) throw new IllegalArgumentException ( ) ; return metricCollectors . remove ( c ) ; }
remove a metrics collector .
