Making custom alert dialogs with Kotlin extension functions

AppsDialogExtnFuncs.kt

/*
 * Notes Dialog
 */
inline fun Activity.showNotesAlertDialog(func: NotesDialogHelper.() -> Unit): AlertDialog =
        NotesDialogHelper(this).apply {
            func()
        }.create()

inline fun Fragment.showNotesAlertDialog(func: NotesDialogHelper.() -> Unit): AlertDialog =
        NotesDialogHelper(this.context!!).apply {
            func()
        }.create()

/*
 * TimeChooser Dialog
 */
inline fun Activity.showTimeChooserAlertDialog(func: TimeChooserDialogHelper.() -> Unit): AlertDialog =
        TimeChooserDialogHelper(this).apply {
            func()
        }.create()

inline fun Fragment.showTimeChooserAlertDialog(func: TimeChooserDialogHelper.() -> Unit): AlertDialog =
        TimeChooserDialogHelper(this.context!!).apply {
            func()
        }.create()