// include the library include 'featureLibrary.php'; // check if the "newFeature" feature is active if (isFeatureActive('newFeature')) { // do something } else { // do something else }In this example, we are including a feature library file that contains the definition of the `isFeatureActive()` function. We are then using this function to check whether the "newFeature" feature is active or not. If it is, we execute some code, and if it is not, we execute some other code. Package library: This function could be part of a larger feature management library or package, which would contain other functions related to feature activation, deactivation, and management.