implementationClass = 'example.plugin.GreetingPlugin'
                }
            }
            publishing {
                repositories {
                    maven { url = '${mavenRepo.uri}' }
                }
            }
        """
        producer.file('src/main/java/example/plugin/GreetingPlugin.java') << pluginImplementation('<7.0')

                    implementationClass = 'example.plugin.GreetingPlugin'
                }
            }
            publishing {
                repositories {
                    maven { url = '${mavenRepo.uri}' }
                }
            }
        """
        producer.file('src/main/java/example/plugin/GreetingPlugin.java') << pluginImplementation()

        consumer.file('settings.gradle') << """

include::sample[dir="snippets/plugins/greetingPlugin/groovy",files="buildSrc/src/main/groovy/GreetingPlugin.gradle[]"]
====

The `GreetingPlugin` can now be applied in other subprojects' builds by using its ID:

====
include::sample[dir="snippets/plugins/greetingPlugin/kotlin",files="app/build.gradle.kts[tag=use-plugin]"]
include::sample[dir="snippets/plugins/greetingPlugin/groovy",files="app/build.gradle[tag=use-plugin]"]
====

----

----

In this example, `GreetingPluginExtension` is a class that represents the convention.
The message property is the convention property with a default value of 'Hello from GreetingPlugin'.

Users can override this value in their build script:

====
[.multi-language-sample]
=====
.build.gradle.kts
[source,kotlin]
----
GreetingPluginExtension {