select_behavior(event) {
      const toggle_select = OS.isMac ? event.metaKey : event.ctrlKey;
      const multi_select = event.shiftKey;
      const single_select = !toggle_select && !multi_select;
      return {
        toggle_select: toggle_select,
        multi_select: multi_select,
        single_select: single_select,
      };
    }
// Returns an object describing the selection behaviour.
Returns an object describing the selection behaviour.
Returns an object describing the selection behaviour .
select_behavior(event) {
      const toggle_select = OS.isMac ? event.metaKey : event.ctrlKey;
      const multi_select = event.shiftKey;
      const single_select = !toggle_select && !multi_select;
      return {
        toggle_select: toggle_select,
        multi_select: multi_select,
        single_select: single_select,
      };
    }
select_behavior ( event ) { const toggle_select = OS . isMac ? event . metaKey : event . ctrlKey ; const multi_select = event . shiftKey ; const single_select = ! toggle_select && ! multi_select ; return { toggle_select : toggle_select , multi_select : multi_select , single_select : single_select , } ; }
Returns an object describing the selection behaviour.
Returns an object describing the selection behaviour .