The YAML serializer. This will use either Psych or Syck, which ever your ruby interpreter defaults to. You can also force VCR to use Psych or Syck by using one of those serializers.
@private
The file extension to use for this serializer.
@return [String] “yml”
# File lib/vcr/cassette/serializers/yaml.rb, line 23 def file_extension "yml" end