can you EXPORT_FUNCTIONS a function which is not a task?

  digging into that whole class function inheritance thing as
explained in the bitbake manual:

https://docs.yoctoproject.org/bitbake/2.18/bitbake-user-manual/bitbake-user-manual-metadata.html#flexible-inheritance-for-class-functions

and the first couple paragraphs:

"Through coding techniques and the use of EXPORT_FUNCTIONS, BitBake
supports exporting a function from a class such that the class
function appears as the default implementation of the function, but
can still be called if a recipe inheriting the class needs to define
its own version of the function.

"To understand the benefits of this feature, consider the basic
scenario where a class defines a task function and your recipe
inherits the class. In this basic scenario, your recipe inherits the
task function as defined in the class..."

  bounce back and forth between talking about inheritance, first,
simply of "functions", then switch to referring to "task functions."
so which is it? can you export non-task functions? does that even make
any sense?

  i tested by adding a non-task function (base_do_rday) to
base.bbclass, did not "addtask" it, and parsing did not complain when
i added it to the EXPORT_FUNCTIONS line. should that have worked?

rday