scala - value is not a member of Equals -


i'm trying add object list (third list), i'm using code

    var okii = result.firstlist.find(dimension => firstobj.rank == firstobjrank).map(_.secondlist).getorelse(seq.empty).find(secondobj => secondobj.rank == secondobjrank).getorelse(seq.empty)     okii.thirdlist :+ newobj

but error:

value not member of equals

my structure:

"result" : {     "firstlist": [{         "firstobject": "objectfirstlist"     }, {         "secondlist": [{                 "secondobject": "objectsecondlist"             },             "thirdlist": [{                 "thirdobject": "objectthirdlist"             }]         ]     }] }


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