This method is only available on newer versions. The first available version (v2_6_3) is shown here.
convert_to_backward_compatible_key(key)
for settings’ keys
# File lib/bundler/yaml_serializer.rb, line 80 def convert_to_backward_compatible_key(key) key = "#{key}/" if key =~ /https?:/ && key !~ %{/\Z} key = key.gsub(".", "__") if key.include?(".") key end