'Create a new search domain.
:type domain_name: string
:param domain_name: A string that represents the name of a
domain. Domain names must be unique across the domains
owned by an account within an AWS region. Domain names
must start with a letter or number and can contain the
following characters: a-z (lowercase), 0-9, and -
(hyphen). Uppercase letters and underscores are not
allowed.
:raises: BaseException, InternalException, LimitExceededException'

def create_domain(self, domain_name):

    doc_path = ('create_domain_response', 'create_domain_result', 'domain_status')
    params = {'DomainName': domain_name}
    return self.get_response(doc_path, 'CreateDomain', params, verb='POST')
