pub trait LayoutHTMLInputElementHelpers<'dom> {
fn value_for_layout(self) -> Cow<'dom, str>;
fn size_for_layout(self) -> u32;
fn selection_for_layout(self) -> Option<Range<usize>>;
fn checked_state_for_layout(self) -> bool;
fn indeterminate_state_for_layout(self) -> bool;
}