`sig type text val lowercase : ?locale:string -> CamomileLibrary.CaseMap.Type.text -> CamomileLibrary.CaseMap.Type.text val uppercase : ?locale:string -> CamomileLibrary.CaseMap.Type.text -> CamomileLibrary.CaseMap.Type.text val titlecase : ?locale:string -> CamomileLibrary.CaseMap.Type.text -> CamomileLibrary.CaseMap.Type.text val casefolding : CamomileLibrary.CaseMap.Type.text -> CamomileLibrary.CaseMap.Type.text val compare_caseless : CamomileLibrary.CaseMap.Type.text -> CamomileLibrary.CaseMap.Type.text -> int end`