BaseViewModel for DataBinding

BaseViewModel.kt

package com.vk.android.base

import android.app.Application
import androidx.lifecycle.AndroidViewModel
import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
import com.vk.android.network.ApiService
import com.vk.android.utils.EventMsg
import io.reactivex.disposables.CompositeDisposable
import java.lang.ref.WeakReference

open class BaseViewModel<T>(application: Application) : AndroidViewModel(application) {

    protected val apiClient by lazy { ApiService.create() }
    var isLoading = MutableLiveData<Boolean>()
    protected var navigator: WeakReference<T>? = null
    protected val compositeDisposable = CompositeDisposable()

    private val _snackbarText = MutableLiveData<EventMsg<String>>()
    val snackbarMessage: LiveData<EventMsg<String>> = _snackbarText


    open fun getNavigator(): T? {
        return navigator?.get()
    }

    open fun setNavigator(navigator: T) {
        this.navigator = WeakReference(navigator)
    }

    fun showSnackBarMessage(message: String) {
        _snackbarText.value = EventMsg(message)
    }

    override fun onCleared() {
        compositeDisposable.dispose()
        super.onCleared()
    }
}