@classmethod
def _get_validated_genome_version(cls, input_genome_build_version):
    """ Make sure genome version is acceptable """
    if input_genome_build_version is None:
        result = cls.DEFAULT_GENOME_VERSION
    elif input_genome_build_version not in cls.SUPPORTED_GENOME_BUILD_VERSIONS:
        str_of_acceptable_versions = ', '.join(cls.
            SUPPORTED_GENOME_BUILD_VERSIONS)
        raise ValueError(
            "Input genome build version '{0}' is not recognized. Supported builds are {1}"
            .format(input_genome_build_version, str_of_acceptable_versions))
    else:
        result = input_genome_build_version
    return result
