fun Application.root(id: String, fixed: Boolean = false, init: Root.() -> Unit): Root
Create new Root container based on ID
id - ID attribute of element in the main HTML file
fixed - if false, the container is rendered with Bootstrap "container-fluid" class,
otherwise it's rendered with "container" class (default is false)
init - an initializer extension function
Return
the created Root container
fun Application.root(element: <ERROR CLASS>, fixed: Boolean = false, init: Root.() -> Unit): Root
Create new Root container based on HTML element
element - HTML element in the DOM tree
fixed - if false, the container is rendered with Bootstrap "container-fluid" class,
otherwise it's rendered with "container" class (default is false)
init - an initializer extension function
Return
the created Root container