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Summary:

public interface Validator

android.service.autofill.Validator

Known indirect subclasses

LuhnChecksumValidator	Validator that returns `true` if the number created by concatenating all given fields pass a Luhn algorithm checksum.
RegexValidator	Defines if a field is valid based on a regular expression (regex).

Class used to define whether a condition is satisfied.

Typically used to avoid displaying the save UI when the user input is invalid.