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Any rules

AnyRules describe constraints applied exclusively to the google.protobuf.Any well-known type.

in

in requires the field's type_url to be equal to one of the specified values. If it doesn't match any of the specified values, an error message is generated.

any.in example
message MyAny {
  //  The `value` field must have a `type_url` equal to one of the specified values.
  google.protobuf.Any value = 1 [(buf.validate.field).any.in = ["type.googleapis.com/MyType1", "type.googleapis.com/MyType2"]];
}

not_in

requires the field's type_url to be not equal to any of the specified values. If it matches any of the specified values, an error message is generated.

any.not_in example
message MyAny {
  // The field `value` must not have a `type_url` equal to any of the specified values.
  google.protobuf.Any value = 1 [(buf.validate.field).any.not_in = ["type.googleapis.com/ForbiddenType1", "type.googleapis.com/ForbiddenType2"]];
}