"prefix_len": 32
                            },
                            {
                              "address_prefix": "192.168.195.211",
                              "prefix_len": 32
                            },
                            {
                              "address_prefix": "192.168.252.206",
                              "prefix_len": 32
                            },

                              "prefix_len": 32
                            },
                            {
                              "address_prefix": "192.168.195.211",
                              "prefix_len": 32
                            },
                            {
                              "address_prefix": "192.168.252.206",
                              "prefix_len": 32
                            },

                        {
                          "ranges": [
                            {
                              "address_prefix": "10.104.171.68",
                              "prefix_len": 32
                            }
                          ],
                          "on_match": {
                            "matcher": {
                              "matcher_tree": {

    assertThat(source.read(sourceBuffer, 1024)).isEqualTo(-1)
    assertThat(sourceBuffer.size).isEqualTo(0)
    source.close()
    assertThat(relay.isClosed).isTrue()
    assertFile(Relay.PREFIX_CLEAN, 13L, metadata.size, "abcdefghijklm", metadata)
  }

  @Test
  fun multipleSources() {
    val upstream = Buffer()
    upstream.writeUtf8("abcdefghijklm")
    val relay = edit(file, upstream, metadata, 1024)

      // Read the header.
      val header = Buffer()
      fileOperator.read(0, header, FILE_HEADER_SIZE)
      val prefix = header.readByteString(PREFIX_CLEAN.size.toLong())
      if (prefix != PREFIX_CLEAN) throw IOException("unreadable cache file")
      val upstreamSize = header.readLong()
      val metadataSize = header.readLong()

      // Read the metadata.

			m = map[string]*matcher.Matcher_OnMatch{}
			for _, rm := range ip.GetRangeMatchers() {
				for _, r := range rm.Ranges {
					cidr := r.AddressPrefix
					pl := r.PrefixLen.GetValue()
					if pl != 32 && pl != 128 {
						cidr += fmt.Sprintf("/%d", pl)
					}
					m[cidr] = rm.OnMatch
				}
			}
		default:
			panic("unhandled")
		}
	}
	outputs := []string{}

    python3 - <<EOF
from ipaddress import ip_network, IPv6Network;
from itertools import islice;

net = ip_network('$CIDR')
net_bits = 128 if type(net) == IPv6Network else 32;
net_len = pow(2, net_bits - net.prefixlen)
start, end = int(net_len / 4 * 3), net_len
if net_len > 2000:
  start, end = 1000, 2000

[print(str(ip) + "/" + str(ip.max_prefixlen)) for ip in islice(ip_network('$CIDR').hosts(), start, end)]
EOF
}