Note that it doesn't do anything yet beyond basic XML validation
because the default registry system doesn't use registration types,
but this serves as a template for the other domain commands using
registration types and provides a method that TLDs implementing custom
logic can use. This also explicitly doesn't yet handle the response
extensions.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=123245388
a09f478ac0