code: public void setMissingConfigWarning(Object value) {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEventEnabled()) {
              Tr.event(tc, "Setting missing config warning delay to [" + value + "]");
          }
          try {
              long num = MetatypeUtils.parseLong(PROPERTY_CONFIG_ALIAS, PROPERTY_MISSING_CONFIG_WARNING, value, missingConfigWarning);
              if (0L <= num) {
                  this.missingConfigWarning = num;
              }
          } catch (NumberFormatException nfe) {
              if (TraceComponent.isAnyTracingEnabled() && tc.isEventEnabled()) {
                  Tr.event(tc, "Value is not a number");
              }
          }
      }
docs: Set the custom property for the delay before warning about missing
  configuration values.
  
  @param value