anchor.diff:  # Dockerfile for installing the necessary dependencies for building Hadoop.
   # See BUILDING.txt.
   
  -FROM ubuntu:xenial
  +FROM ubuntu:bionic
   
   WORKDIR /root
   
  
positive.code:     && apt-get install -y --no-install-recommends nodejs npm \
      && apt-get clean \
      && rm -rf /var/lib/apt/lists/* \
      && ln -s /usr/bin/nodejs /usr/bin/node \
      && npm install npm@latest -g \
      && npm install -g jshint
  
  
negative.code:         git \
          gnupg-agent \
          libbz2-dev \
          libfuse-dev \
          libprotobuf-dev \
          libprotoc-dev \
  