call-as-primary-owner in editor-canvas%

Calls a thunk and returns the value. While the thunk is being called, if the canvas has an editor, the editor's get-admin method returns the administrator for this canvas. This method is only useful when an editor is displayed in multiple canvases.

• (send an-editor-canvas call-as-primary-owner f) -> return value of f
   f : procedure of zero arguments

  Returns (f).