code: public void setUnidirectional(boolean flag) {
          if (flag) {
              ext.setOidValue(_DIALG_UNI);
              // super.oidValue = _DIALG_UNI;
          } else {
              ext.setOidValue(_DIALG_STRUCTURED);
              // super.oidValue = _DIALG_STRUCTURED;
          }
          this.uniDirectional = flag;
  
      }
docs: /*
  (non-Javadoc)
  
  @see org.restcomm.protocols.ss7.tcap.asn.DialogPortion#setUnidirectional( boolean)