if(Utils::isTest()) { // this code will execute only in a test environment $mockObject = new MockObject(); $mockObject->setIsTest(true); // set a flag on the mock object }In this example, we create a new MockObject and set a flag on it if the code is executing in a test environment. This allows us to control the behavior of the object during testing. The package/library that the Utils isTest function belongs to is unclear based on the information provided. It could be a part of a larger testing framework or utility library, or it could be a standalone function included in a specific project.