void started(BuildOperationDescriptor buildOperation, OperationStartEvent startEvent) {
                    println("[\$pid] [\$timer.elapsed] start " + buildOperation.displayName)
                }

                void progress(OperationIdentifier operationIdentifier, OperationProgressEvent progressEvent) {
                }

                    this.startedLatch = startedLatch
                }

                @Override
                public BuildOperationDescriptor.Builder description() {
                    return BuildOperationDescriptor.displayName("test operation");
                }

                @Override
                public void run(BuildOperationContext context) {

                context.setResult(BUILD_BUILDSRC_RESULT);
                return classPath;
            }

            @Override
            public BuildOperationDescriptor.Builder description() {
                //noinspection Convert2Lambda
                return BuildOperationDescriptor.displayName("Build buildSrc").
                    progressDisplayName("Building buildSrc").
                    details(

        }

        @Override
        public void started(BuildOperationDescriptor buildOperation, OperationStartEvent startEvent) {
        }

        @Override
        public void progress(OperationIdentifier operationIdentifier, OperationProgressEvent progressEvent) {
        }

        @Override
        public void finished(BuildOperationDescriptor buildOperation, OperationFinishEvent finishEvent) {

                cleanupAction.execute(new DefaultCleanupProgressMonitor(context));
            }

            @Override
            public BuildOperationDescriptor.Builder description() {
                return BuildOperationDescriptor.displayName(cleanupAction.getDisplayName());
            }
        });
    }

                    processor.process(new TextResourceScriptSource(resource), gradle);
                }
            }

            @Override
            public BuildOperationDescriptor.Builder description() {
                return BuildOperationDescriptor.displayName("Run init scripts").progressDisplayName("Running init scripts");
            }
        });
    }

                context.failed(result.getException());
                return result;
            }

            @Override
            public BuildOperationDescriptor.Builder description() {
                return BuildOperationDescriptor.displayName(spec.getDisplayName())
                    .parent(parentBuildOperation)

        Operation(UserCodeApplicationId applicationId) {
            this.applicationId = applicationId;
        }

        @Override
        public BuildOperationDescriptor.Builder description() {
            return BuildOperationDescriptor
                .displayName("Execute container callback action")
                .details(new OperationDetails(applicationId));
        }
    }

                        return metadata;
                    }
                }

                @Override
                public BuildOperationDescriptor.Builder description() {
                    return BuildOperationDescriptor.displayName("Unpack build cache entry " + key.getHashCode())
                        .details(new UnpackOperationDetails(key, file.length()))

                    classpathBuilder
                );
                creator.create(file, classpath);
            }

            @Override
            public BuildOperationDescriptor.Builder description() {
                return BuildOperationDescriptor
                    .displayName("Generate " + file)
                    .progressDisplayName("Generating " + file.getName());
            }
        }));