imenu-progress-message

imenu-progress-message is a Lisp macro in `imenu.el'.

(imenu-progress-message PREVPOS &optional RELPOS REVERSE)

Macro to display a progress message.
RELPOS is the relative position to display.
If RELPOS is nil, then the relative position in the buffer
is calculated.
PREVPOS is the variable in which we store the last position displayed.