gistfile1.txt

// Reducer that fetches the content (if not currently loading)
fun loadContent() = quantum.setState {
    // Do not try to load the content while currently loading
    // Returning this (the current / input state) signals the quantum that 
    // this reducer was a NOOP
    if(isLoading) return@setState this
    
    // Dispatch a async loading operation with myRepository (exemplary)
    myRepository.loadContent
        .onSuccess(::onContentLoaded)
        .onError(::onError)
        .execute()
        
    // Copy the current state but set loading flag  
    copy(isLoading = true)
    
}

fun onContentLoaded(content: Content) = setState {
    // Content loaded: 
    // Copy current state and clear any error
    copy(content = content, error = null)
}

fun onError(error: Error) = setState {
    // Copy current state but publish the error
    copy(error = error)
}