com_baeldung_rxjava_RxJavaCustomOperatorUnitTest_java
rx.internal.operators.OnSubscribeFromIterable
 -> java.lang.Iterable.iterator(): java.util.Iterator -> java.util.Iterator.hasNext(): boolean -> java.util.Iterator.next(): java.lang.Object -> java.util.Iterator.hasNext(): boolean -> java.util.Iterator.next(): java.lang.Object -> java.util.Iterator.hasNext(): boolean -> java.util.Collection.iterator(): java.util.Iterator -> java.util.Iterator.hasNext(): boolean -> java.util.Iterator.next(): java.lang.Object -> java.util.Iterator.hasNext(): boolean