/**
 * Transform listener that forwards all receiving events to the client via the provided {@code ProgressEventConsumer} instance.
 *
 * @since 5.1
 */
class TransformOperationMapper implements BuildOperationMapper<ExecutePlannedTransformStepBuildOperationDetails, DefaultTransformDescriptor>, OperationDependencyLookup {
    private final Map<TransformStepNode, DefaultTransformDescriptor> descriptors = new ConcurrentHashMap<>();

        TaskOperationMapper taskOperationMapper = new TaskOperationMapper(postProcessors, taskOriginTracker, operationDependenciesResolver);
        operationDependenciesResolver.addLookup(taskOperationMapper);

        List<BuildOperationMapper<?, ?>> mappers = ImmutableList.of(
            new FileDownloadOperationMapper(),
            new TestOperationMapper(testTaskTracker),
            new ProjectConfigurationOperationMapper(projectConfigurationTracker),

import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

import static java.util.Collections.emptySet;
import static java.util.Collections.singletonList;

class TaskOperationMapper implements BuildOperationMapper<ExecuteTaskBuildOperationDetails, DefaultTaskDescriptor>, OperationDependencyLookup {
    private final Map<TaskIdentity<?>, DefaultTaskDescriptor> descriptors = new ConcurrentHashMap<>();