+;;;###autoload
+(defvar imenu-name-lookup-function nil
+ "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\".
+
+This variable is local in all buffers.")
+;;;###autoload
+(make-variable-buffer-local 'imenu-name-lookup-function)
+