tinymce.full.js
function getNavigationRoot(targetControl) {
        var navigationRoot, controls;

        targetControl = targetControl || focusedControl;
        controls = targetControl.parents().toArray();
        controls.unshift(targetControl);

        for (var i = 0; i < controls.length; i++) {
          navigationRoot = controls[i];

          if (navigationRoot.settings.ariaRoot) {
            break;
          }
        }

        return navigationRoot;
      }
function getNavigationRoot(targetControl) {
        var navigationRoot, controls;

        targetControl = targetControl || focusedControl;
        controls = targetControl.parents().toArray();
        controls.unshift(targetControl);

        for (var i = 0; i < controls.length; i++) {
          navigationRoot = controls[i];

          if (navigationRoot.settings.ariaRoot) {
            break;
          }
        }

        return navigationRoot;
      }
function getNavigationRoot ( targetControl ) { var navigationRoot , controls ; targetControl = targetControl || focusedControl ; controls = targetControl . parents ( ) . toArray ( ) ; controls . unshift ( targetControl ) ; for ( var i = 0 ; i < controls . length ; i ++ ) { navigationRoot = controls [ i ] ; if ( navigationRoot . settings . ariaRoot ) { break ; } } return navigationRoot ; }
Returns the navigation root control for the specified control. The navigation root
is the control that the keyboard navigation gets scoped to for example a menubar or toolbar group.
It will look for parents of the specified target control or the currently focused control if this option is omitted.

@private
@param {tinymce.ui.Control} targetControl Optional target control to find root of.
@return {tinymce.ui.Control} Navigation root control.
Returns the navigation root control for the specified control . The navigation root is the control that the keyboard navigation gets scoped to for example a menubar or toolbar group . It will look for parents of the specified target control or the currently focused control if this option is omitted .