anchor.diff:  <% when "cloudwatch" %>
   gem "aws-sdk-cloudwatchlogs", "~> 1.0"
   <% if is_v1 %>
  -gem "fluent-plugin-cloudwatch-logs", "~> 0.7.3"
  +gem "fluent-plugin-cloudwatch-logs", "~> 0.7.4"
   <% else %>
   gem "fluent-plugin-cloudwatch-logs", "0.4.5"
   <% end %>
  
positive.code: <% end %>
  <% when "gcs" %>
  <% if is_v1 %>
  gem "fluent-plugin-gcs", "0.4.0.beta1"
  <% else %>
  gem "fluent-plugin-gcs", "~> 0.3"
  <% end %>
  
negative.code: gem "gelf", "3.0.0"
  <% if is_v1 %>
  gem "fluent-plugin-gelf-hs", "~> 1.0.7"
  <% else %>
  gem "fluent-plugin-gelf-hs"
  gem "fluent-plugin-record-modifier", "< 1.0.0"
  