Failure.kt

/**
 * Base Class for handling errors/failures/exceptions.
 * Every feature specific failure should extend [FeatureFailure] class.
 */
sealed class Failure(val exception: Exception = Exception("Failure")) {
    object None : Failure()
    object NetworkConnection : Failure()
    object ServerError : Failure()

    /** * Extend this class for feature specific failures.*/
    open class FeatureFailure(featureException: Exception = Exception("Feature failure")) : Failure(featureException)

    override fun equals(other: Any?): Boolean {
        return other is Failure
    }
}

if you could explain it's usage, please

read more here: https://medium.com/@cesarmcferreira/how-to-use-the-new-android-viewmodelscope-in-clean-architecture-2a33aac959ee