return vfsRoot.empty();
            }

            @Override
            public BuildOperationDescriptor.Builder description() {
                return BuildOperationDescriptor.displayName(BuildStartedFileSystemWatchingBuildOperationType.DISPLAY_NAME)
                    .details(BuildStartedFileSystemWatchingBuildOperationType.Details.INSTANCE);
            }

    def broadcaster = manager.broadcaster
    def events = []

    def id1 = new OperationIdentifier(1)
    def op1 = BuildOperationDescriptor.displayName("1").build(id1, null)
    def id2 = new OperationIdentifier(2)
    def op2 = BuildOperationDescriptor.displayName("2").build(id2, null)

    def startEvent = new OperationStartEvent(0)
    def progressEvent = new OperationProgressEvent(0, null)

    }

    private void track(BuildOperationDescriptor buildOperation, PluginApplication pluginApplication) {
        runningPluginApplications.put(buildOperation.getId(), pluginApplication);
    }

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

    @Override

                return action.execute(new DefaultCleanupProgressMonitor(context));
            }

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

            } finally {
                context.setResult(LIST_RESULT);
            }
        }

        @Override
        public BuildOperationDescriptor.Builder description() {
            return BuildOperationDescriptor
                .displayName("List " + parent.getUri())
                .details(new ListOperationDetails(parent.getUri()));
        }
    }

                    parameters.outputFile.get().asFile
                }

                void started(BuildOperationDescriptor buildOperation, OperationStartEvent startEvent) {}

                void progress(OperationIdentifier operationIdentifier, OperationProgressEvent progressEvent) {}

                void finished(BuildOperationDescriptor buildOperation, OperationFinishEvent finishEvent) {}
            }

    }

    private BuildOperationDescriptor.Builder createBuildOperationDetails(ExternalResourceName resourceName) {
        ExternalResourceReadBuildOperationType.Details operationDetails = new ReadOperationDetails(resourceName.getUri());
        return BuildOperationDescriptor
            .displayName("Download " + resourceName.getUri())

                    }
                });
            }
        }

        @Override
        public BuildOperationDescriptor.Builder description() {
            return BuildOperationDescriptor
                .displayName("Upload " + destination.getUri())
                .progressDisplayName(destination.getShortDisplayName())

                context.setResult(RESULT);
            }

            @Override
            public BuildOperationDescriptor.Builder description() {
                String stage = transformer.getStage();
                String name = "Compile " + source.getShortDisplayName() + " (" + stage + ")";
                return BuildOperationDescriptor.displayName(name)
                    .name(name)
                    .details(new Details(stage));

                    }
                    return result;
                }

                @Override
                public BuildOperationDescriptor.Builder description() {
                    return BuildOperationDescriptor.displayName("Run build").details(DETAILS);
                }
            });
        } finally {
            buildOperationNotificationValve.stop();
        }
    }