and query them with @code{specifier-specs} or @code{specifier-instance}.
You will get an error if you try to set them using @code{setq}. The
valid instantiators for these specifiers are toolbar descriptors, as
and query them with @code{specifier-specs} or @code{specifier-instance}.
You will get an error if you try to set them using @code{setq}. The
valid instantiators for these specifiers are toolbar descriptors, as