decode_value (SNMP::VarBind)

    # File lib/snmp/varbind.rb, line 530
            def decode_value(data)
                value_tag, value_data, remainder = decode_tlv(data)
                decoder_class = ValueDecoderMap[value_tag]
                if decoder_class
                    value = decoder_class.decode(value_data)
                else
                   raise UnsupportedValueTag, value_tag.to_s
                end
                return value, remainder
            end