javax.validation.ValidationException: HV000182: No validation value unwrapper is registered for type 'java.util.Map<java.lang.String, java.lang.String>'.
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.getInitializedValidatorInstanceForWrappedInstance(ConstraintTree.java:188)
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.getInitializedConstraintValidator(ConstraintTree.java:171)
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:116)
at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:87)
at org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:73)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:617)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:580)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForSingleDefaultGroupElement(ValidatorImpl.java:524)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:492)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:457)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:407)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateCascadedConstraint(ValidatorImpl.java:795)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateCascadedConstraints(ValidatorImpl.java:681)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateParametersInContext(ValidatorImpl.java:1141)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateParameters(ValidatorImpl.java:299)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateParameters(ValidatorImpl.java:253)
at ValidatorTest.validateUnsafe(ValidatorTest.java:72)
at ValidatorTest.validate(ValidatorTest.java:51)
at ValidatorTest.run(ValidatorTest.java:37)
at ValidatorTest.main(ValidatorTest.java:16)