Component

open class MyComponent: Component {
     override fun render(...) {
         // some content rendering
     }
}

RenderContext.myComponent(
     // most params omitted
     build: MyComponent.() -> Unit = {}
) {
     MyComponent().apply(build).render(this, /* params */)
      //                         ^^^^^^
      //                         just start the rendering by one additional call!
 }

open class MyComponent(protected val items: List<String>, protected val store: Store<String>?): Component {
     override fun render(...) {
         // some content rendering with access to the ``items`` and the ``store``
     }
}

RenderContext.myComponent(
     styling: BasicParams.() -> Unit,
     items: List<String>,          // two additional parameters
     value: Store<String>? = null, // after ``styling`` and before ``baseClass``!
     baseClass: StyleClass,
     id: String?,
     prefix: String
     build: MyComponent.() -> Unit = {}
) {
     MyComponent(items, store) // inject additional parameters
         .apply(build)
         .render(this, styling, baseClass, id, prefix) // pass context + regular parameters
}