code: private void removeSessionValue(String pName) {
          if (pName.equals(SECURITY_PROP_NAME)) { // make sure app doesn't try to remove this
              if (com.ibm.ejs.ras.TraceComponent.isAnyTracingEnabled() && LoggingUtil.SESSION_LOGGER_CORE.isLoggable(Level.FINE)) {
                  LoggingUtil.SESSION_LOGGER_CORE.logp(Level.FINE, methodClassName, methodNames[REMOVE_SESSION_VALUE], "attempt to remove security info failed");
              }
              return;
          }
          super.removeAttribute(pName);
      }
docs: /*
  removeSessionValue - handles special security property