}
    }

    private ChannelInfo selectRoundRobin(Collection<ChannelInfo> channels) {
        List<ChannelInfo> list = new ArrayList<>(channels);
        int index = Math.abs(roundRobinCounter.getAndIncrement() % list.size());
        return list.get(index);
    }

    private ChannelInfo selectLeastLoaded(Collection<ChannelInfo> channels) {
        ChannelInfo leastLoadedChannel = null;

        return new String(c);
    }

    /**
     * Converts a byte array to a hexadecimal string representation.
     *
     * @param src the source byte array to convert
     * @param srcIndex the starting index in the source array
     * @param size the number of bytes to convert from the source array
     * @return a hexadecimal string representation of the byte array
     */

          "gidNumber" : {
            "type" : "long"
          },
          "name" : {
            "type" : "keyword"
          }
        }
      }
    },
    "settings" : {
      "index" : {
        "creation_date" : "1509021058796",
        "number_of_shards" : "5",
        "number_of_replicas" : "1",
        "uuid" : "5EWS2-qMT2WwHG0yPrhP3Q",
        "version" : {
          "created" : "6000051"

          "updatedTime" : {
            "type" : "long"
          },
          "virtualHost" : {
            "type" : "keyword"
          }
        }
      }
    },
    "settings" : {
      "index" : {
        "creation_date" : "1509021054613",
        "number_of_shards" : "5",
        "number_of_replicas" : "1",
        "uuid" : "tqxL0WgAR665iLtdrY81AA",
        "version" : {
          "created" : "6000051"

                throw new IllegalStateException("SigningDigest is closed");
            }

            // zero out signature field
            final int index = offset + SIGNATURE_OFFSET;
            for (int i = 0; i < SIGNATURE_LENGTH; i++) {
                data[index + i] = 0;
            }

            // set signed flag
            final int oldFlags = SMBUtil.readInt4(data, offset + 16);

          },
          "startTime" : {
            "type" : "long"
          },
          "target" : {
            "type" : "keyword"
          }
        }
      }
    },
    "settings" : {
      "index" : {
        "creation_date" : "1509021054334",
        "number_of_shards" : "5",
        "number_of_replicas" : "1",
        "uuid" : "vIZ3R-jCRzGKaZvpZHRFPw",
        "version" : {
          "created" : "6000051"

          },
          "url" : {
            "type" : "keyword"
          },
          "userInfoId" : {
            "type" : "keyword"
          }
        }
      }
    },
    "settings" : {
      "index" : {
        "creation_date" : "1509021060038",
        "number_of_shards" : "5",
        "number_of_replicas" : "1",
        "uuid" : "LRohRohXTCGxGdsabXPNnQ",
        "version" : {
          "created" : "6000051"

          },
          "value" : {
            "type" : "keyword"
          },
          "webConfigId" : {
            "type" : "keyword"
          }
        }
      }
    },
    "settings" : {
      "index" : {
        "creation_date" : "1509021056434",
        "number_of_shards" : "5",
        "number_of_replicas" : "1",
        "uuid" : "Zrp1Be7PS1ySzKAjlrpICg",
        "version" : {
          "created" : "6000051"

          },
          "updatedBy" : {
            "type" : "keyword"
          },
          "updatedTime" : {
            "type" : "long"
          }
        }
      }
    },
    "settings" : {
      "index" : {
        "creation_date" : "1509021049746",
        "number_of_shards" : "5",
        "number_of_replicas" : "1",
        "uuid" : "0xToIxg0R1KjZqA0ynv9PQ",
        "version" : {
          "created" : "6000051"

        // Call deprecated method with type parameter
        final int deleted = fesenClient.deleteByQuery("test-index", "_doc", QueryBuilders.matchAllQuery());

        assertEquals(0, deleted);
        // Verify it used the same search logic (type parameter is ignored)
        verify(mockClient).prepareSearch("test-index");
    }

    /**
     * Test: Verify that OnConnectListener is properly invoked
     */
    @Test