com_baeldung_rxjava_UtilityOperatorsIntegrationTest_java
rx.exceptions.CompositeException
 -> java.util.Collection.iterator(): java.util.Iterator -> java.util.Iterator.hasNext(): boolean -> java.util.Iterator.next(): java.lang.Object -> java.util.Set.add(java.lang.Object): boolean -> java.util.Iterator.hasNext(): boolean -> java.util.Iterator.next(): java.lang.Object -> java.util.Set.add(java.lang.Object): boolean -> java.util.Iterator.hasNext(): boolean -> java.util.List.addAll(java.util.Collection): boolean -> java.util.Collections.unmodifiableList(java.util.List): java.util.List -> java.util.List.size(): int -> java.lang.StringBuilder.append(int): java.lang.StringBuilder -> java.lang.StringBuilder.append(java.lang.String): java.lang.StringBuilder -> java.lang.StringBuilder.toString(): java.lang.String