select
  n.nspname as schema,
  p.proname as function_name,
  pg_get_functiondef(p.oid) as definition
from pg_proc p
join pg_namespace n on n.oid = p.pronamespace
where n.nspname = 'public'
  and pg_get_functiondef(p.oid) ilike '%entitlements_invalidation%';