package org.jetbrains.dokka.pages import org.jetbrains.dokka.model.properties.ExtraProperty class SimpleAttr(val extraKey: String, val extraValue: String) : ExtraProperty { data class SimpleAttrKey(val key: String) : ExtraProperty.Key override val key: ExtraProperty.Key = SimpleAttrKey(extraKey) companion object { fun header(value: String) = SimpleAttr("data-togglable", value) } } object HtmlContent : ExtraProperty, ExtraProperty.Key { override val key: ExtraProperty.Key = this }