and accessing the variable value directly, explicitly check for a
frame-parameter, and if there is one, use its value in preference to
that of the variable. Note that buffer-local values should take
-preference over frame-local ones, so you may wish to check `local-variable-p'
+precedence over frame-local ones, so you may wish to check `local-variable-p'
first.
** The function invisible-p returns non-nil if the character