fun Container.flexPanel(direction: FlexDir? = null, wrap: FlexWrap? = null, justify: FlexJustify? = null, alignItems: FlexAlignItems? = null, alignContent: FlexAlignContent? = null, spacing: Int? = null, classes: Set<String> = setOf(), init: (FlexPanel.() -> Unit)? = null): FlexPanel
DSL builder extension function.
It takes the same parameters as the constructor of the built component.