code: function rethrowPostcssError(error: Object): WrappedError {
    error.message = `${chalk.yellow('PostCSS error:')} ${error.message}`;
    if (error.name === 'CssSyntaxError') {
      error.message = error.message + '\n' + error.showSourceCode();
    }
    const typedError = wrapError(error, errorTypes.CssCompilationError);
    throw typedError;
  }
docs: Special logging for PostCSS errors. Makes them very easy to understand.