pub trait TreeRowRenderer<H: UiHost> {
// Required method
fn render_row(
&mut self,
cx: &mut ElementContext<'_, H>,
entry: &TreeEntry,
state: TreeRowState,
) -> Elements;
// Provided method
fn render_trailing(
&mut self,
_cx: &mut ElementContext<'_, H>,
_entry: &TreeEntry,
_state: TreeRowState,
) -> Elements { ... }
}