fn drag_left_loop_selection_edge(
ui: &Ui,
time_ranges_ui: &TimeRangesUi,
selected_range: &mut ResolvedTimeRangeF,
left_edge_id: Id
) -> Option<()>
fn drag_left_loop_selection_edge(
ui: &Ui,
time_ranges_ui: &TimeRangesUi,
selected_range: &mut ResolvedTimeRangeF,
left_edge_id: Id
) -> Option<()>