"everything has convention and is set"             | setAll("convention", "convention") | setAll("test", "baz") | """id = test\nbar = baz"""
    }

    def "sensible error when conventions are set more than once (#testCase)"() {
        given:
        withSoftwareTypePlugins().prepareToExecute()

The `com.myorg.library-conventions` and `com.myorg.service-conventions` plugins both apply the `com.myorg.java-conventions` plugin:
====
include::sample[dir="kotlin",files="convention-plugins/src/main/kotlin/com.myorg.library-conventions.gradle.kts[tags=plugins];convention-plugins/src/main/kotlin/com.myorg.service-conventions.gradle.kts[tags=plugins]"]

The `com.myorg.library-conventions` and `com.myorg.service-conventions` plugins both apply the `com.myorg.java-conventions` plugin:
====
include::sample[dir="kotlin",files="convention-plugins/src/main/kotlin/com.myorg.library-conventions.gradle.kts[tags=plugins];convention-plugins/src/main/kotlin/com.myorg.service-conventions.gradle.kts[tags=plugins]"]

fun <T : Any> Convention.getPlugin(conventionType: KClass<T>): T =
    getPlugin(conventionType.java)


/**
 * Locates the plugin convention object with the given type.
 *
 * @param T the convention plugin type.
 * @return the convention plugin, or null if there is no such convention plugin
 * @throws [IllegalStateException] when there are multiple matching objects
 * @see [Convention.findPlugin]

plugins {
    id 'java-library'
    id 'myproject.publishing-conventions'
}

publishing {
    publications {
        maven(MavenPublication) {
            from components.java
        }
    }

// Define conventions for service projects this organization.
// Service projects need to use the organization's Java conventions and pass some additional checks

// tag::plugins[]
plugins {
    id("com.myorg.java-conventions")
}
// end::plugins[]

val integrationTest by sourceSets.creating

configurations[integrationTest.implementationConfigurationName].extendsFrom(configurations.testImplementation.get())

// tag::conventions[]
tasks.register("show") {
    def property = objects.property(String)

    // Set a convention
    property.convention("convention 1")

    println("value = " + property.get())

    // Can replace the convention
    property.convention("convention 2")
    println("value = " + property.get())

    property.set("explicit value")

    // Once a value is set, the convention is ignored

// tag::conventions[]
tasks.register("show") {
    val property = objects.property(String::class)

    // Set a convention
    property.convention("convention 1")

    println("value = " + property.get())

    // Can replace the convention
    property.convention("convention 2")
    println("value = " + property.get())

    property.set("explicit value")

    // Once a value is set, the convention is ignored

└── settings.gradle.kts
----
<1> Create the `myproject.java-conventions` convention plugin.
<2> Applies the `myproject.java-conventions` convention plugin.
=====
[.multi-language-sample]
=====
[source, groovy]
----
.
├── buildSrc
│   ├── src
│   │   └──main
│   │      └──groovy
│   │         └──myproject.java-conventions.gradle  // <1>
│   └── build.gradle
├── api
│   ├── src

plugins {
    id("java-library")
    id("myproject.publishing-conventions")
}

publishing {
    publications {
        create<MavenPublication>("maven") {
            from(components["java"])
        }
    }