JIRA: https://jira.spring.io/browse/INT-2634 The Map entries with non-String keys are now skipped just with WARN message, instead of `IllegalArgumentException` as it was before
JIRA: https://jira.spring.io/browse/INT-2634 The Map entries with non-String keys are now skipped just with WARN message, instead of `IllegalArgumentException` as it was before