The example that describes the behaviour of a system should be valid however you use a system. The behaviour is not expected to be different if you its web user interface or through its rest api.
This leads us to want to use the same example and verify that the system works through different seams and with different clients or devices.
Recycling examples means that the seam, client, or device must be specified when the system is built.
This is a Java example. Specifying runtime properties for the JVM is done
using -Dproperpty-name=property-value.
This can be used to specify a combination of the seam, the client, and the device that should be used for a specific execution.
The example uses Gradle, build it with:
./gradlew cucumber
This will build the system and verify that the core works as expected. That is, that the model works as expected.