Puli\Manager\Conflict\DependencyGraph::addDependency PHP Method

    public function addDependency($moduleName, $dependency)
    {
        if (!isset($this->moduleNames[$dependency])) {
            throw new RuntimeException(sprintf('The module "%s" does not exist in the graph.', $dependency));
        }
        if (!isset($this->moduleNames[$moduleName])) {
            throw new RuntimeException(sprintf('The module "%s" does not exist in the graph.', $moduleName));
        }
        if (null !== ($path = $this->getPath($dependency, $moduleName))) {
            $last = array_pop($path);
            throw new CyclicDependencyException(sprintf('A cyclic dependency was discovered between the modules "%s" ' . 'and "%s". Please check the "override" keys defined in these ' . 'modules.', implode('", "', $path), $last));
        }
        $this->dependencies[$moduleName][$dependency] = true;
    }

 /**
  * {@inheritdoc}
  */
 public function execute()
 {
     $rootModuleName = $this->rootModule->getName();
     $rootModuleFile = $this->rootModule->getModuleFile();
     foreach ($this->mapping->getConflictingModules() as $conflictingModule) {
         $moduleName = $conflictingModule->getName();
         if (!$rootModuleFile->hasDependency($moduleName)) {
             $rootModuleFile->addDependency($moduleName);
             $this->overriddenModules[] = $moduleName;
         }
         if (!$this->overrideGraph->hasDependency($rootModuleName, $moduleName)) {
             $this->overrideGraph->addDependency($rootModuleName, $moduleName);
             $this->addedEdgesFrom[] = $moduleName;
         }
     }
 }