https://lucene.apache.org/core/7_7_2/core/org/apache/lucene/codecs/lucene50/Lucene50PostingsWriter.html
Lucene50PostingsWriter (Lucene 7.7.2 API)
luceneapi
https://lucene.apache.org/core/8_1_0/core/org/apache/lucene/codecs/lucene50/class-use/Lucene50PostingsWriter.html
Uses of Class org.apache.lucene.codecs.lucene50.Lucene50PostingsWriter (Lucene 8.1.0 API)