inline fun <reified K : Any> Container.formPanel(method: FormMethod? = null, action: String? = null, enctype: FormEnctype? = null, type: FormType? = null, classes: Set<String> = setOf(), noinline init: (FormPanel<K>.() -> Unit)? = null): FormPanel<K>
DSL builder extension function.
It takes the same parameters as the constructor of the built component.