sidletski

**Do you want to request a feature, report a bug or ask a question?** A bug/question **What is the current behavior?** Looks like svg-sprite-loader using with sprite loader plugin in...

[Configuration documentation](https://github.com/callstack/linaria/blob/master/docs/CONFIGURATION.md) says that the default value for the `classNameSlug` and `variableNameSlug` options is `"default"`, but I think it's more like an `undefined` value or `"[hash]"` for `classNameSlug`