longEscapedCmd = unlines
    [ "RUN wget https://download.com/${version}.tar.gz -O /tmp/logstash.tar.gz && \\"
    , "(cd /tmp && tar zxf logstash.tar.gz && mv logstash-${version} /opt/logstash && \\"
    , "rm logstash.tar.gz) && \\"
    , "(cd /opt/logstash && \\"
    ,  "/opt/logstash/bin/plugin install contrib)"
    ]
longEscapedCmd = unlines
    [ "RUN wget https://download.com/${version}.tar.gz -O /tmp/logstash.tar.gz && \\"
    , "(cd /tmp && tar zxf logstash.tar.gz && mv logstash-${version} /opt/logstash && \\"
    , "rm logstash.tar.gz) && \\"
    , "(cd /opt/logstash && \\"
    ,  "/opt/logstash/bin/plugin install contrib)"
    ]
longEscapedCmd = unlines
    [ "RUN wget https://download.com/${version}.tar.gz -O /tmp/logstash.tar.gz && \\"
    , "(cd /tmp && tar zxf logstash.tar.gz && mv logstash-${version} /opt/logstash && \\"
    , "rm logstash.tar.gz) && \\"
    , "(cd /opt/logstash && \\"
    ,  "/opt/logstash/bin/plugin install contrib)"
    ]