code: function processShorthandPropertyConfiguration () {
  
    // Fetch extensions implementing .processShorthandPropertyConfiguration(...) method
    let extensions = _.filter(this.extensions, (extension) => {
      return extension.implemented.processShorthandPropertyConfiguration;
    });
  
    // Create a proxy .processShorthandPropertyConfiguration(...) method
    this.processShorthandPropertyConfiguration =  (propertyConfiguration) => {
      // Execute all extensions' .processShorthandPropertyConfiguration(...) method and update configuration
      _.forEach(extensions, (extension) => {
        propertyConfiguration = extension.processShorthandPropertyConfiguration(propertyConfiguration);
      });
      // Return updated configuration
      return propertyConfiguration;
    };
  
  }
docs: Creates a method used to call all extensions' .processShorthandPropertyConfiguration(...) method when needed (if the extension is implementing it)