pub trait HTMLSlotElementMethods<D>where
    D: DomTypes,{
    // Required methods
    fn Name(&self) -> DOMString;
    fn SetName(&self, value: DOMString);
    fn AssignedNodes(
        &self,
        options: &AssignedNodesOptions,
    ) -> Vec<Root<Dom<<D as DomTypes>::Node>>>;
    fn AssignedElements(
        &self,
        options: &AssignedNodesOptions,
    ) -> Vec<Root<Dom<<D as DomTypes>::Element>>>;
    fn Assign(&self, nodes: Vec<ElementOrText<D>>);
}