write some bultin api docs
write some bultin api docs

waruqi/xmake,waruqi/xmake,tboox/xmake,waruqi/xmake,tboox/xmake,waruqi/xmake,waruqi/xmake,tboox/xmake,waruqi/xmake,tboox/xmake,tboox/xmake,tboox/xmake,waruqi/xmake,tboox/xmake