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bool keep_alive_pings;
If the idle interval is set, this setting affects the behavior of the stream when no data is received for the timeout interval as follows:
keep_alive_pings
              is true, an idle ping
              will be sent automatically. If another timeout interval elapses with
              no received data then the connection will be closed. An outstanding
              read operation must be pending, which will complete immediately the
              error timeout.
            keep_alive_pings
              is false, the connection
              will be closed. An outstanding read operation must be pending, which
              will complete immediately the error timeout.