/usr/lib/erlang/lib/cosTime-1.2.3/ is in erlang-dev 1:20.2.2+dfsg-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/erlang/lib/cosTime-1.2.3/include/
/usr/lib/erlang/lib/cosTime-1.2.3/include/CosTime.hrl
/usr/lib/erlang/lib/cosTime-1.2.3/include/CosTime_TIO.hrl
/usr/lib/erlang/lib/cosTime-1.2.3/include/CosTime_TimeService.hrl
/usr/lib/erlang/lib/cosTime-1.2.3/include/CosTime_UTO.hrl
/usr/lib/erlang/lib/cosTime-1.2.3/include/CosTimerEvent.hrl
/usr/lib/erlang/lib/cosTime-1.2.3/include/CosTimerEvent_TimerEventHandler.hrl
/usr/lib/erlang/lib/cosTime-1.2.3/include/CosTimerEvent_TimerEventService.hrl
/usr/lib/erlang/lib/cosTime-1.2.3/include/TimeBase.hrl
/usr/lib/erlang/lib/cosTime-1.2.3/include/oe_CosTime.hrl
/usr/lib/erlang/lib/cosTime-1.2.3/include/oe_CosTimerEvent.hrl
/usr/lib/erlang/lib/cosTime-1.2.3/include/oe_TimeBase.hrl