code: protected void updateStartEjbsAtAppStart(Boolean startEjbsAtAppStart) {
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled())
              Tr.debug(tc, "updateStartEjbsAtAppStart : "
                           + (ContainerProperties.InitializeEJBsAtStartup == null ? "Update : " : "Ignore : ")
                           + startEjbsAtAppStart);
  
          if (ContainerProperties.InitializeEJBsAtStartup == null) {
              if (startEjbsAtAppStart != null) {
                  ivInitAtStartupSet = true;
                  ivInitAtStartup = startEjbsAtAppStart;
              } else {
                  ivInitAtStartupSet = false;
                  ivInitAtStartup = false;
              }
          }
      }
docs: Updates the start EJBs at application start (initAtStartup) settings. <p>
  
  @param startEjbsAtAppStart true indicates beans should start at application start;
  false indicates beans should start at first use;
  null indicates the setting from ibm-ejb-jar-ext.xml should be used.