com_baeldung_introductionjukito_CalculatorUnitTest_java
com.google.common.cache.LocalCache$LoadingValueReference
 -> java.lang.System.nanoTime(): long -> java.util.concurrent.TimeUnit.convert(long,java.util.concurrent.TimeUnit): long
 [CALL] [CALL] [CALL] [CALL] [CALL] -> java.lang.System.nanoTime(): long [EXIT] [EXIT] [EXIT] -> java.util.concurrent.TimeUnit.convert(long,java.util.concurrent.TimeUnit): long [EXIT] [EXIT]