then:
        0 * _

        then:
        result.valueSnapshots as Map == [:]
        result.fileFingerprints as Map == [:]
    }

    def "reuses previous input snapshots when visiting input properties"() {
        def previousSnapshot = Mock(ValueSnapshot)

        when:
        def result = fingerprintInputProperties(ImmutableSortedMap.of("identity", previousSnapshot)) { visitor ->

			}
			return err
		}
	}
	return nil
}

// WalkDir walks the file tree rooted at root, calling fn for each file or
// directory in the tree, including root.
//
// All errors that arise visiting files and directories are filtered by fn:
// see the [fs.WalkDirFunc] documentation for details.
//
// The files are walked in lexical order, which makes the output deterministic

             * {@link VisitState#getName()} and {@link VisitState#getPath()} may be called during.
             */
            void preDirectory(VisitState state);

            /**
             * Called when visiting a non-directory file.
             * <p>
             * {@link VisitState#getName()}, {@link VisitState#getPath()} and {@link VisitState#getHashBytes()} may be called during.
             */

build --distinct_host_configuration=false

# Store performance profiling log in the mounted artifact directory.
# The profile can be viewed by visiting chrome://tracing in a Chrome browser.
# See https://docs.bazel.build/versions/main/skylark/performance.html#performance-profiling
build --profile=/tf/pkg/profile.json.gz

            return transformSteps;
        }

        @Override
        public void prepareForVisitingIfNotAlready() {
            // The parameters of the transforms should already be isolated prior to visiting this set.
            // However, in certain cases, the transform's parameters may not be isolated (eg https://github.com/gradle/gradle/issues/23116), so do this now

build --copt=-Wno-gnu-offsetof-extensions

# Store performance profiling log in the mounted artifact directory.
# The profile can be viewed by visiting chrome://tracing in a Chrome browser.
# See https://docs.bazel.build/versions/main/skylark/performance.html#performance-profiling
build --profile=/tf/pkg/profile.json.gz

        then:
        1 * visitor.startVisit(_, collection) >> true
        1 * source1.visitStructure(visitor)
        1 * source2.visitStructure(visitor)
        0 * _
    }

    void "listener can skip visiting children"() {
        def visitor = Mock(FileCollectionStructureVisitor)
        def source1 = Mock(FileCollectionInternal)
        def source2 = Mock(FileCollectionInternal)

                // We cannot clean in progress markers, or in progress files here because
                // the file system visitor stuff can't handle the file system mutating while visiting
                if (!isInProgressMarkerFile(file) && !isInProgressFile(file)) {
                    entries.add(entryAt(file));
                }
            }
        });

        return entries;
    }

		if _, found := s.imm[k]; !found {
			delete(s.mm.pod.pmm, k)
		}
	}
	s.imm = nil
}

func (s *sstate) BeginCounterDataFile(cdf string, cdr *decodecounter.CounterDataReader, dirIdx int) {
	dbgtrace(2, "visiting counter data file %s diridx %d", cdf, dirIdx)
	if s.inidx != dirIdx {
		if s.inidx > dirIdx {
			// We're relying on having data files presented in
			// the order they appear in the inputs (e.g. first all

        Set<Node> visited = new HashSet<>();
        Set<Node> visiting = new HashSet<>();
        while (!queue.isEmpty()) {
            Node node = queue.get(0);
            if (node.isComplete() || visited.contains(node)) {
                queue.remove(0);
                continue;
            }
            if (visiting.add(node)) {
                int pos = 0;