https://haifengl.github.io/api/java/smile/util/IntDoubleHashMap.html
IntDoubleHashMap
declaration: package: smile.util, class: IntDoubleHashMap
https://lucene.apache.org/core/10_3_2/core/org/apache/lucene/internal/hppc/IntDoubleHashMap.IntDoubleCursor.html
IntDoubleHashMap.IntDoubleCursor (Lucene 10.3.2 core API)
declaration: package: org.apache.lucene.internal.hppc, class: IntDoubleHashMap, class: IntDoubleCursor
lucenecoreapi