# Deprecated API

## Contents

- Deprecated Classes
- Deprecated Methods

- Deprecated Classes
  Class and Description
  org.apache.lucene.codecs.lucene40.Lucene40SkipListWriter Only for reading old 4.0 segments

- Deprecated Methods
  Method and Description
  org.apache.lucene.analysis.CollationTestBase.encodeCollationKey(byte[]) only for testing deprecated filters

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