anchor.diff:  
   # SDKs
   # Please keep these in descending order!
  -RUN sdkmanager "platforms;android-26"
  -RUN sdkmanager "platforms;android-25"
  -RUN sdkmanager "platforms;android-24"
  -RUN sdkmanager "platforms;android-23"
  -RUN sdkmanager "platforms;android-22"
  -RUN sdkmanager "platforms;android-21"
  -RUN sdkmanager "platforms;android-20"
  -RUN sdkmanager "platforms;android-19"
  -RUN sdkmanager "platforms;android-17"
  -RUN sdkmanager "platforms;android-15"
  -RUN sdkmanager "platforms;android-10"
  -
  +RUN sdkmanager \
  +    "platforms;android-26" \
  +    "platforms;android-25" \
  +    "platforms;android-24" \
  +    "platforms;android-23" \
  +    "platforms;android-22" \
  +    "platforms;android-21" \
  +    "platforms;android-20" \
  +    "platforms;android-19" \
  +    "platforms;android-17" \
  +    "platforms;android-15" \
  +    "platforms;android-10" \
   # build tools
   # Please keep these in descending order!
  -RUN sdkmanager "build-tools;26.0.1"
  -RUN sdkmanager "build-tools;26.0.0"
  -RUN sdkmanager "build-tools;25.0.3"
  -RUN sdkmanager "build-tools;25.0.2"
  -RUN sdkmanager "build-tools;24.0.3"
  -RUN sdkmanager "build-tools;23.0.3"
  -RUN sdkmanager "build-tools;22.0.1"
  -RUN sdkmanager "build-tools;21.1.2"
  -RUN sdkmanager "build-tools;20.0.0"
  -RUN sdkmanager "build-tools;19.1.0"
  -RUN sdkmanager "build-tools;17.0.0"
  -
  +    "build-tools;26.0.1" \
  +    "build-tools;26.0.0" \
  +    "build-tools;25.0.3" \
  +    "build-tools;25.0.2" \
  +    "build-tools;24.0.3" \
  +    "build-tools;23.0.3" \
  +    "build-tools;22.0.1" \
  +    "build-tools;21.1.2" \
  +    "build-tools;20.0.0" \
  +    "build-tools;19.1.0" \
  +    "build-tools;17.0.0" \
   # Android System Images, for emulators
   # Please keep these in descending order!
  -RUN sdkmanager "system-images;android-25;google_apis;armeabi-v7a"
  -RUN sdkmanager "system-images;android-24;default;armeabi-v7a"
  -RUN sdkmanager "system-images;android-22;default;armeabi-v7a"
  -RUN sdkmanager "system-images;android-21;default;armeabi-v7a"
  -RUN sdkmanager "system-images;android-19;default;armeabi-v7a"
  -RUN sdkmanager "system-images;android-17;default;armeabi-v7a"
  -RUN sdkmanager "system-images;android-15;default;armeabi-v7a"
  -
  +    "system-images;android-25;google_apis;armeabi-v7a" \
  +    "system-images;android-24;default;armeabi-v7a" \
  +    "system-images;android-22;default;armeabi-v7a" \
  +    "system-images;android-21;default;armeabi-v7a" \
  +    "system-images;android-19;default;armeabi-v7a" \
  +    "system-images;android-17;default;armeabi-v7a" \
  +    "system-images;android-15;default;armeabi-v7a" \
   # Extras
  -RUN sdkmanager "extras;android;m2repository"
  -RUN sdkmanager "extras;google;m2repository"
  -RUN sdkmanager "extras;google;google_play_services"
  +    "extras;android;m2repository" \
  +    "extras;google;m2repository" \
  +    "extras;google;google_play_services" \
   
   # Constraint Layout
   # Please keep these in descending order!
  -RUN sdkmanager "extras;m2repository;com;android;support;constraint;constraint-layout;1.0.2"
  -RUN sdkmanager "extras;m2repository;com;android;support;constraint;constraint-layout;1.0.1"
  +    "extras;m2repository;com;android;support;constraint;constraint-layout;1.0.2" \
  +    "extras;m2repository;com;android;support;constraint;constraint-layout;1.0.1" \
   
   # google apis
   # Please keep these in descending order!
  -RUN sdkmanager "add-ons;addon-google_apis-google-23"
  -RUN sdkmanager "add-ons;addon-google_apis-google-22"
  -RUN sdkmanager "add-ons;addon-google_apis-google-21"
  +    "add-ons;addon-google_apis-google-23" \
  +    "add-ons;addon-google_apis-google-22" \
  +    "add-ons;addon-google_apis-google-21"
   
   # ------------------------------------------------------
   # --- Install Gradle from PPA
   
   # Gradle PPA
  -RUN apt-get update
  -RUN apt-get -y install gradle
  -RUN gradle -v
  +RUN apt-get update \
  + && apt-get -y install gradle \
  + && gradle -v
   
   # ------------------------------------------------------
   # --- Install Maven 3 from PPA
   
  -RUN apt-get purge maven maven2
  -RUN apt-get update
  -RUN apt-get -y install maven
  -RUN mvn --version
  +RUN apt-get purge maven maven2 \
  + && apt-get update \
  + && apt-get -y install maven \
  + && mvn --version
   
   
   # ------------------------------------------------------
  
positive.code: 
  RUN echo "deb https://packages.cloud.google.com/apt cloud-sdk-`lsb_release -c -s` main" | sudo tee -a /etc/apt/sources.list.d/google-cloud-sdk.list
  RUN curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
  RUN sudo apt-get update -qq
  RUN sudo apt-get install -y -qq google-cloud-sdk
  
  ENV GCLOUD_SDK_CONFIG /usr/lib/google-cloud-sdk/lib/googlecloudsdk/core/config.json
  
  
negative.code: # ------------------------------------------------------
  # --- Install Fastlane
  
  RUN gem install fastlane --no-document \
   && fastlane --version
  
  # ------------------------------------------------------
  # --- Install Google Cloud SDK
  