APR_DECLARE_EXTERNAL_HOOK  309 srclib/apr-util/hooks/apr_hooks.c APR_DECLARE_EXTERNAL_HOOK(apr,APU,void,_optional,(void))
APR_DECLARE_EXTERNAL_HOOK   42 srclib/apr-util/include/apr_hooks.h #define APR_DECLARE_EXTERNAL_HOOK(ns,link,ret,name,args) \