Classic ConcurrentModificationException: for-each + Collection.remove() mid-loop
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list before: [1, 2, 3, 4, 5]
threw: java.util.ConcurrentModificationException

stack trace (trimmed to the ArrayList$Itr frames that matter):
java.util.ConcurrentModificationException
at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1096)
at java.base/java.util.ArrayList$Itr.next(ArrayList.java:1050)
at com.ankurm.interviewlab.collections.ConcurrentModificationTest.lambda$classicForEachPlusCollectionRemoveThrows$0(ConcurrentModificationTest.java:28)
at com.ankurm.interviewlab.collections.ConcurrentModificationTest.classicForEachPlusCollectionRemoveThrows(ConcurrentModificationTest.java:27)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1604)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1604)