select process_type, process_source
from apex_application_page_proc t
where t.application_name = 'Oracle APEX Workspace Administration' and t.page_name = 'Create/Edit User Group'

select s.name, s.line, s.text
from dba_dependencies d
   , dba_source s
where d.referenced_name = 'WWV_FLOW_FND_USER_GROUPS'
  and d.type = 'PACKAGE BODY'
  and d.name = s.name
  and s.type = 'PACKAGE'
  and instr( lower(s.text), 'group' ) > 0 
  and ( instr( lower(s.text), 'function' ) > 0 or instr( lower(s.text), 'procedure' ) > 0  )