imenu-name-lookup-function

imenu-name-lookup-function is a variable defined in `imenu.el'.
Its value is

nil

• Automatically becomes buffer-local when set.
• This variable may be risky if used as a file-local variable.

Documentation:
Function to compare string with index item.

This function will be called with two strings, and should return
non-nil if they match.

If nil, comparison is done with `string='.
Set this to some other function for more advanced comparisons,
such as "begins with" or "name matches and number of
arguments match".