call-as-primary-owner

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

• (send a-wx:media-canvas call-as-primary-owner f) -> return value of f
      f : a procedure of zero arguments

  Returns (f).