public Builder idleConnectionTimeoutMillis(final long idleConnectionTimeoutMillis) {
            this.idleConnectionTimeoutMillis = idleConnectionTimeoutMillis;
            return this;
        }
Sets the time in milliseconds that the driver will allow a channel to not receive read or writes before it automatically closes.
gremlin-driver/src/main/java/org/apache/tinkerpop/gremlin/driver/Cluster.java