code: public final void setARMCorrelator(String value) {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(this, tc, "setARMCorrelator", value);
          getHdr2().setField(JsHdr2Access.REQUESTMETRICS_CORRELATOR_ARM, value);
          // The ARM and RM fields must be set as a pair, so if RM appears unset
          // ensure it is null.
          if (getHdr2().getField(JsHdr2Access.REQUESTMETRICS_CORRELATOR_RM) == null)
              getHdr2().setField(JsHdr2Access.REQUESTMETRICS_CORRELATOR_RM, null);
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(this, tc, "setARMCorrelator");
      }
docs: /*
  Set the ARM correlator inthe header
  Javadoc description supplied by JsMessage interface.