# File lib/snmp/pdu.rb, line 45
        def decode_version(data)
            version_data, remainder = decode_integer(data)
            if version_data == SNMP_V1
                version = :SNMPv1
            elsif version_data == SNMP_V2C
                version = :SNMPv2c
            else
                raise UnsupportedVersion, version_data.to_s
            end
            return version, remainder
        end