attributes {
        attribute(Usage.USAGE_ATTRIBUTE, project.objects.named(Usage.JAVA_RUNTIME))
        attribute(Category.CATEGORY_ATTRIBUTE, project.objects.named(Category.LIBRARY))
        attribute(LibraryElements.LIBRARY_ELEMENTS_ATTRIBUTE, project.objects.named("gradle-local-repository"))
        attribute(Bundling.BUNDLING_ATTRIBUTE, project.objects.named(Bundling.EMBEDDED))
    }
    extendsFrom(testRepo.get())
}

----
Attributes
    - org.gradle.category            = library
    - org.gradle.dependency.bundling = external
    - org.gradle.jvm.version         = 11
    - org.gradle.libraryelements     = jar
    - org.gradle.usage               = java-runtime
----

What it tells us is that the Java Library plugin produces variants with 5 attributes:

            attribute(Usage.USAGE_ATTRIBUTE, objects.named(Usage.JAVA_RUNTIME))
            attribute(Category.CATEGORY_ATTRIBUTE, objects.named(Category.LIBRARY))
            attribute(LibraryElements.LIBRARY_ELEMENTS_ATTRIBUTE, objects.named(LibraryElements.JAR))
        }
        isCanBeResolved = true
        isCanBeConsumed = false
        isVisible = false
        extends.forEach { extendsFrom(it) }
    }

    attributes {
        attribute(Usage.USAGE_ATTRIBUTE, project.objects.named(Usage.JAVA_RUNTIME))
        attribute(Category.CATEGORY_ATTRIBUTE, project.objects.named(Category.LIBRARY))
        attribute(LibraryElements.LIBRARY_ELEMENTS_ATTRIBUTE, project.objects.named("gradle-local-repository"))
        attribute(Bundling.BUNDLING_ATTRIBUTE, project.objects.named(Bundling.EMBEDDED))
    }
}

// TODO De-duplicate this
/**

                                       "org.gradle.dependency.bundling": "external",
                                       "org.gradle.jvm.version": currentJavaVersion,
                                       "org.gradle.libraryelements": "jar",
                                       "org.gradle.usage": "java-api",
                                      ])
        assertAttributes(runtimeElements, ["org.gradle.category": "library",

- `org.gradle.category` indicates the type of component (library, platform or documentation). This attribute is mostly used to disambiguate Maven POM files derived either as a platform or a library. Value must be a string.
- `org.gradle.libraryelements` indicates the content of a `org.gradle.category=library` variant, like `jar`, `classes` or `headers-cplusplus`. Value must be a string.

                    variant "runtime", [
                        'org.gradle.status': 'release',
                        'org.gradle.category':'library',
                        'org.gradle.libraryelements':'jar',
                        'org.gradle.usage':'java-runtime'
                    ]
                }
            }
        }
    }

                            }
                        ],
                        "attributes": {
                            "org.gradle.usage": "java-runtime",
                            "org.gradle.libraryelements": "jar",
                            "org.gradle.category": "library"
                        },
                        "files": [
                            {
                                "name": "foo-1.0.jar",

        """

        file("consumer/build.gradle") << """
            configurations.register("config") {
                attributes {
                    attribute(LibraryElements.LIBRARY_ELEMENTS_ATTRIBUTE, objects.named(LibraryElements, LibraryElements.CLASSES))
                    attribute(Usage.USAGE_ATTRIBUTE, objects.named(Usage, Usage.JAVA_RUNTIME))
                }
            }
            dependencies {

    /**
     * Provides or requires a library
     */
    JvmEcosystemAttributesDetails library();

    /**
     * Provides or requires a library with specific elements.
     * See {@link org.gradle.api.attributes.LibraryElements} for possible values.
     */
    JvmEcosystemAttributesDetails library(String elementsType);

    /**
     * Provides or requires a platform
     */
    JvmEcosystemAttributesDetails platform();

    /**