Additionally, replace one
(or (org-mode-p) (derived-mode-p 'org-mode))
with
(derived-mode-p 'org-mode)
cause that is reflexive anyway (returns true, if the current mode is
org-mode).
Delete one check testing for org-mode or org derived mode
org-registry-assoc-all removed matching links from the registry. This meant
subsequent calls with the same parameters would return nothing.
Add another function for finding entries in the register, which used find-if to
get entries satisfying a predicate.