advice--buffer-local-function-sample

advice--buffer-local-function-sample is a variable defined in `nadvice.el'.
Its value is

nil

Documentation:
keeps an example of the special "run the default value" functions.
These functions play the same role as t in buffer-local hooks, and to recognize
them, we keep a sample here against which to compare. Each instance is
different, but `function-equal' will hopefully ignore those differences.