Man pages matching name tsmimehdrfieldvalueintset in section 3ts:

TSMimeHdrFieldValueIntSet.3ts.en	debian 10 / trafficserver-dev
TSMimeHdrFieldValueIntSet.3ts.en	debian 11 / trafficserver-dev
TSMimeHdrFieldValueIntSet.3ts.en	debian 12 / trafficserver-dev