message: defaultClasses(gh-page): FindOrCreate: add link to common-plugins
  closes typegoose/typegoose#266
diff: @@ -38,6 +38,8 @@ This class provides all the types supplied by the plugin `mongoose-findOrCreate`
  -> This class should only be used, if the plugin is used too
  +[An Example can be seen in common-plugins]({{ site.baseurl }}{% link _guides/advanced/common-plugins.md %}#mongoose-findorcreate)
  +
  ## Extra information
  Here you can find extra information.
  