builder.append('^');
            visitType(exceptionType, builder);
        }
    }

    private static void visitParameters(Type[] parameterTypes, StringBuilder builder) {
        builder.append('(');
        visitTypes(parameterTypes, builder);
        builder.append(')');
    }

    private static void visitTypes(Type[] types, StringBuilder builder) {
        for (Type type : types) {

        failures.add(failure);
    }

    @Override
    public FileCollectionStructureVisitor.VisitType prepareForVisit(FileCollectionInternal.Source source) {
        if (source instanceof LocalDependencyFiles) {
            return FileCollectionStructureVisitor.VisitType.NoContents;
        }
        return FileCollectionStructureVisitor.VisitType.Visit;
    }

    @Override
    public boolean requireArtifactFiles() {

            // have changing inputs
            FileCollectionStructureVisitor.VisitType.NoContents
        } else {
            FileCollectionStructureVisitor.VisitType.Visit
        }
    }

    override fun requireArtifactFiles(): Boolean {
        return true
    }

    override fun visitFailure(failure: Throwable) {