https://docs.oracle.com/javase/jp/15/docs/api/java.base/java/util/AbstractMap.SimpleImmutableEntry.html
AbstractMap.SimpleImmutableEntry (Java SE 15 & JDK 15)
declaration: module: java.base, package: java.util, class: AbstractMap, class: SimpleImmutableEntry
java sejdk
https://developer.android.com/reference/java/util/AbstractMap?authuser=7
AbstractMap | API reference | Android Developers
api referenceandroiddevelopers