This operation checks the availability of one domain name. Note that if the availability status of a domain is pending, you must submit another request to determine the availability of the domain name.
/// The requested item is not acceptable. For example, for an OperationId it may refer
/// to the ID of an operation that is already completed. For a domain name, it may not
/// be a valid domain name or belong to the requester account.
///
/// Amazon Route 53 does not support this top-level domain.
///