com_baeldung_hystrix_SpringAndHystrixIntegrationTest_java
org.springframework.util.ConcurrentReferenceHashMap
 -> java.lang.Object.hashCode(): int -> java.lang.Object.hashCode(): int -> java.lang.Object.hashCode(): int -> java.util.concurrent.atomic.AtomicInteger.get(): int -> java.lang.ref.ReferenceQueue.poll(): java.lang.ref.Reference -> java.util.concurrent.atomic.AtomicInteger.get(): int -> java.lang.ref.SoftReference.get(): java.lang.Object -> java.lang.Object.equals(java.lang.Object): boolean