x-dnd-maybe-call-test-function

x-dnd-maybe-call-test-function is a compiled Lisp function in `x-dnd.el'.

(x-dnd-maybe-call-test-function WINDOW ACTION)

Call `x-dnd-test-function' if something has changed.
WINDOW is the window the mouse is over. ACTION is the suggested
action from the source. If nothing has changed, return the last
action and type we got from `x-dnd-test-function'.