Fix example for `@ImportResource` in the reference manual

[Riteshranga99]

The last example code in composing java-based configurations is showing below as TransferService.

public static void main(String[] args) {
	ApplicationContext ctx = new AnnotationConfigApplicationContext(AppConfig.class);
	TransferService transferService = ctx.getBean(TransferService.class);
	// ...
}

But in the example for this the class name is DataSource.

[bclozel]

Can you share a link to the documentation section? Our reference documentation is quite large...

[sbrannen]

The example is at the end of the composing-configuration-classes.adoc document.

It would appear that the example is simply incomplete, since there is no TransferService bean configured for the ApplicationContext.

I'll see if I can rework that to make sense.

[sbrannen]

Hi @Riteshranga99,

Thanks for raising the issue, and congratulations on opening your first GitHub issue ever! 👍

I revised that example in 61b5b1e.

Cheers,

Sam