public Builder setValidateAfterInactivity(final TimeValue validateAfterInactivity) {
            this.validateAfterInactivity = validateAfterInactivity;
            return this;
        }
Defines period of inactivity after which persistent connections must
be re-validated prior to being leased to the consumer. Negative values passed
to this method disable connection validation.
<p>
Default: {@code null} (undefined)
</p>

@return this instance.
httpclient5/src/main/java/org/apache/hc/client5/http/config/ConnectionConfig.java