code: @Override
      public void inject(Object objectToInject,
                         InjectionTarget injectionTarget)
                      throws InjectionException
      {
          final boolean isTraceOn = TraceComponent.isAnyTracingEnabled();
          if (isTraceOn && tc.isEntryEnabled())
              Tr.entry(tc, "inject", objectToInject, injectionTarget);
  
          injectionTarget.inject(objectToInject, null);
  
          if (isTraceOn && tc.isEntryEnabled())
              Tr.exit(tc, "inject");
      }
docs: This method handles the actual injection of injectedObject to the target beanObject using
  either the METHOD or FIELD specified in the injectionTarget.