How do I add components to an interaction response?

event.interaction.respondEphemeral {
    content = "content"
    actionRow {
        interactionButton(ButtonStyle.Primary, "custom-id") {
            label = "label"
        }
    }
}

event.interaction.respondEphemeral {
    content = "content"
    actionRow {
        interactionButton(ButtonStyle.Primary, "custom-id") {
            label = "label"
        }
    }
}