NAME
function_exists() - find the file containing a given function in an object
SYNOPSYS
string function_exists(string str, object ob)
DESCRIPTION
Return the file name of the object that defines the function `str' in
object `ob'. The returned value can be other than `file_name(ob)' if the
function is defined by an inherited object.
0 is returned if the function was not defined.
SEE ALSO
call_other(3)