This ensures anyone checking for a FieldsValidator will correctly fetch out the SimpleFieldsValidator which does the same job, and it ensures that there is only one fields validator there, rather than having both the new default FieldsValidatorand our SimpleFieldsValidator which would duplicate effort.
This ensures anyone checking for a
FieldsValidatorwill correctly fetch out theSimpleFieldsValidatorwhich does the same job, and it ensures that there is only one fields validator there, rather than having both the new defaultFieldsValidatorand ourSimpleFieldsValidatorwhich would duplicate effort.