SubstRuleFormat3(IList< ICollection< int >> backtrackCoverages, IList< ICollection< int >> inputCoverages, IList< ICollection< int >> lookaheadCoverages, SubstLookupRecord[] substLookupRecords) (defined in iText.IO.Font.Otf.Lookuptype6.SubTableLookup6Format3.SubstRuleFormat3)