https://unicode-org.github.io/icu-docs/apidoc/dev/icu4j/com/ibm/icu/util/class-use/ULocale.Category.html
Uses of Class com.ibm.icu.util.ULocale.Category (ICU4J 78)
usesclassibm
https://developer.android.com/reference/android/icu/util/ULocale.Builder?authuser=0
ULocale.Builder | API reference | Android Developers
builder apireferenceandroiddevelopers