skip stack, dark installation due to travis issue

.travis.yml

@@ -75,11 +75,11 @@ before_install:
   - sudo apt-get install -qq curl
   # install dart
   #- sudo apt-get update
-  - sudo apt-get install apt-transport-https
-  - sudo sh -c 'curl https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -'
-  - sudo sh -c 'curl https://storage.googleapis.com/download.dartlang.org/linux/debian/dart_stable.list > /etc/apt/sources.list.d/dart_stable.list'
-  - sudo apt-get update
-  - sudo apt-get install dart
+  #- sudo apt-get install apt-transport-https
+  #- sudo sh -c 'curl https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -'
+  #- sudo sh -c 'curl https://storage.googleapis.com/download.dartlang.org/linux/debian/dart_stable.list > /etc/apt/sources.list.d/dart_stable.list'
+  #- sudo apt-get update
+  #- sudo apt-get install dart
   # install perl module
   #- cpanm --local-lib=~/perl5 local::lib && eval $(perl -I ~/perl5/lib/perl5/ -Mlocal::lib)
   #- cpanm Test::Exception Test::More Log::Any LWP::UserAgent JSON URI:Query Module::Runtime DateTime Module::Find Moose::Role
@@ -109,8 +109,8 @@ install:
   - gcc -v
   - echo $CC
   - echo $CXX
-  - pub version
-  - dart --version
+  #- pub version
+  #- dart --version
 
 script:
   # fail fast

pom.xml

@@ -1020,8 +1020,8 @@
             <modules>
                 <!-- clients -->
                 <!--<module>samples/client/petstore/c</module>-->
-                <module>samples/client/petstore/dart-jaguar/openapi</module>
-                <module>samples/client/petstore/dart-jaguar/flutter_petstore/openapi</module>
+                <!--<module>samples/client/petstore/dart-jaguar/openapi</module>
+                <module>samples/client/petstore/dart-jaguar/flutter_petstore/openapi</module>-->
                 <!--<module>samples/client/petstore/dart2/petstore</module>-->
                 <!--<module>samples/client/petstore/haskell-http-client</module>-->
                 <module>samples/client/petstore/elm-0.18</module>