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kotlinlang

if a java class implements this interface: 
```
interface Foo {
    val bar : FooBar
}
```
the autogenerator generates a getter for that value:
```
class MyClass implements Foo {
    @Override public FooBar getBar() {
        return null; // TODO implement
    }
}
```

Nevertheless I can still call the property from my java code: ```this.bar.doSomething()```. What does this do internally? Will the getter be only called once when the class gets created or will getBar() be called everytime I access the property?