(ConfigurableFileCollection, Provider API, domain object containers) when defining configurable parts of a plugin (tasks, extensions, domain objects).  The Provider API provides a consistent way to set conventions, wire related configuration together (extension <- domain object <- task) and avoid evaluation ordering problems.

The Gradle codebase has evolved over time and has a mixture of simple getter/setter methods, Provider API and things in between.  It can be hard to follow best practices because...

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package gradlebuild.testcleanup

import gradlebuild.testcleanup.extension.TestFileCleanUpExtension
import gradlebuild.testcleanup.extension.TestFilesCleanupProjectState
import org.gradle.api.GradleException
import org.gradle.api.file.DirectoryProperty
import org.gradle.api.file.FileSystemOperations

        String classifier = artifact.getClassifier();
        String extension = artifact.getExtension();
        return getArtifactPath(groupId, artifactId, version, classifier, extension);
    }

    private Path getArtifactPath(
            String groupId, String artifactId, String version, String classifier, String extension) {
        Path repo = getProjectLocalRepo();
        return repo.resolve(groupId)

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.execution;

import org.apache.maven.plugin.MojoExecutionException;

/**
 * <p>
 * Extension point that allows build extensions observe and possibly veto mojo executions.
 * </p>
 * <strong>Note:</strong> This interface is part of work in progress and can be changed or removed without notice.
 *

	return p.records
}

// Stop the currently running benchmark.
func (p profilerWrapper) Stop() ([]byte, error) {
	return p.stopFn()
}

// Extension returns the extension without dot prefix.
func (p profilerWrapper) Extension() string {
	return p.ext
}

// Returns current profile data, returns error if there is no active
// profiling in progress. Stops an active profile.

            for (String extension : checksums.keySet()) {
                ChecksumObserver observer = checksums.get(extension);
                sums.put(extension, observer.getActualChecksum());
            }

            // We do this in here so we can checksum the artifact metadata too, otherwise it could be metadata itself
            for (String extension : checksums.keySet()) {

		},
		{
			n: NoncurrentVersionExpiration{
				NoncurrentDays:          90,
				NewerNoncurrentVersions: -2,
				set:                     true,
			},
			err: errXMLNotWellFormed,
		},
		// MinIO extension: supports zero NoncurrentDays when NewerNoncurrentVersions > 0
		{
			n: NoncurrentVersionExpiration{
				NoncurrentDays:          0,
				NewerNoncurrentVersions: 5,
				set:                     true,
			},

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package gradlebuild.identity.extension

import com.google.gson.Gson
import gradlebuild.identity.model.ReleasedVersions
import org.gradle.api.file.RegularFile
import org.gradle.util.GradleVersion
import org.gradle.util.internal.VersionNumber

import gradlebuild.basics.BuildEnvironment
import gradlebuild.docs.FindBrokenInternalLinks
import gradlebuild.integrationtests.tasks.DistributionTest
import gradlebuild.performance.tasks.PerformanceTest
import gradlebuild.testcleanup.extension.TestFilesCleanupBuildServiceRootExtension
import me.champeau.gradle.japicmp.JapicmpTask

if (BuildEnvironment.isCiServer && project.name != "gradle-kotlin-dsl-accessors") {

package gradlebuild.incubation.tasks

import gradlebuild.incubation.action.IncubatingApiReportWorkAction
import gradlebuild.modules.extension.ExternalModulesExtension
import org.gradle.api.DefaultTask
import org.gradle.api.file.ConfigurableFileCollection
import org.gradle.api.file.ProjectLayout
import org.gradle.api.file.RegularFileProperty
import org.gradle.api.provider.Property
import org.gradle.api.tasks.CacheableTask
import org.gradle.api.tasks.Input