Instance Method
add(each:required:customFailureDescription:_:)
@preconcurrency mutating func add(each key: ValidationKey, required: Bool = true, customFailureDescription: String? = nil, _ handler: @escaping @Sendable (Int, inout Validations) -> ())Instance Method
@preconcurrency mutating func add(each key: ValidationKey, required: Bool = true, customFailureDescription: String? = nil, _ handler: @escaping @Sendable (Int, inout Validations) -> ())