gnus-completing-read-function

gnus-completing-read-function is a variable defined in `gnus-util.el'.
Its value is

gnus-emacs-completing-read

• This variable may be risky if used as a file-local variable.

Documentation:
Function use to do completing read.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.1 of Emacs.