When is it better to use variables with getters and when methods?

Question

Kotlin

Here is my class:

/**
 * All classes that has super class [Fragment] by default must extend this class instead of [Fragment]
 */
abstract class BaseFragment(
    @LayoutRes resId: Int,
) : Fragment(resId) {

    protected open val navigator get() = requireActivity() as Navigator

    protected open val sharedData get() = requireActivity() as SharedData

}

Methods can be used:

abstract class BaseFragment(
    @LayoutRes resId: Int,
) : Fragment(resId) {

    protected open fun navigator() = requireActivity() as Navigator

    protected open fun sharedData() = requireActivity() as SharedData

}

How is it better and why?

Answer 1

In this case, it doesn't matter at all. You need to use it in the most convenient way.

Answer 2

well, it's actually possible

protected open val navigator  = requireActivity() as Navigator

    protected open val sharedData = requireActivity() as SharedData

offset then?
and did not understand why open