Using BaseSavedState to handling state changes in single Custom View (Non-inherited Custom View)

PostView.kt

class PostView : FrameLayout {
    private var title: String? = null
    private var description: String? = null
    private var dividerColorResId: Int = 0
    ...
    override fun onSaveInstanceState(): Parcelable? {
        val superState: Parcelable? = super.onSaveInstanceState()
        superState?.let {
            val state = SavedState(superState)
            state.title = this.title
            state.description = this.description
            state.dividerColorResId = this.dividerColorResId
            return state
        } ?: run {
            return superState
        }
    }

    override fun onRestoreInstanceState(state: Parcelable?) {
        when (state) {
            is SavedState -> {
                super.onRestoreInstanceState(state.superState)
                this.title = state.title
                this.description = state.description
                this.dividerColorResId = state.dividerColorResId
                // Restore view's state here
            }
            else -> {
                super.onRestoreInstanceState(state)
            }
        }
    }

    internal class SavedState : BaseSavedState {
        var title: String? = null
        var description: String? = null
        var dividerColorResId: Int = 0

        constructor(superState: Parcelable) : super(superState)

        constructor(source: Parcel) : super(source) {
            title = source.readString()
            description = source.readString()
            dividerColorResId = source.readInt()
        }

        override fun writeToParcel(out: Parcel, flags: Int) {
            super.writeToParcel(out, flags)
            out.writeString(title)
            out.writeString(description)
            out.writeInt(dividerColorResId)
        }

        companion object {
            @JvmField
            val CREATOR: Parcelable.Creator<SavedState> = object : Parcelable.Creator<SavedState> {
                override fun createFromParcel(source: Parcel): SavedState {
                    return SavedState(source)
                }

                override fun newArray(size: Int): Array<SavedState> {
                    return newArray(size)
                }
            }
        }
    }
}