https://commons.apache.org/proper/commons-validator/apidocs/org/apache/commons/validator/routines/DomainValidator.ArrayType.html
DomainValidator.ArrayType (Apache Commons Validator 1.10.2-SNAPSHOT API)
declaration: package: org.apache.commons.validator.routines, class: DomainValidator, enum: ArrayType
apache commonsvalidatorsnapshotapi