• Lucene50PostingsFormat
• Lucene50PostingsFormat.IntBlockTermState
• Lucene50PostingsReader
• Lucene60PointsFormat
• Lucene60PointsReader
• Lucene70Codec
• Lucene70DocValuesFormat
• Lucene70NormsFormat
• Lucene70SegmentInfoFormat
• Lucene80Codec
• Lucene84Codec
• Placeholder