result.getTasks().add(new GoalTask("t2"));
        return result;
    }

    class Dependency {
        MavenProject dependant;

        MavenProject dependency;

        Dependency(MavenProject dependant, MavenProject dependency) {
            this.dependant = dependant;
            this.dependency = dependency;
        }

        void addIfDownstream(MavenProject mavenProject, List<MavenProject> result) {

                        master.put(key, element);

                        if (!pending.isEmpty()) {
                            predecessors.put(key, pending);
                            pending = new ArrayList<>();
                        }
                    } else {
                        pending.add(element);
                    }
                }

                        master.put(key, existing);
                        if (!pending.isEmpty()) {
                            predecessors.put(key, pending);
                            pending = new ArrayList<>();
                        }
                    } else {
                        pending.add(element);
                    }
                }