BreakpointManager::getBreakpointsByGroup

public BreakpointManager::getBreakpointsByGroup($group)

public function getBreakpointsByGroup($group) {
  if (!isset($this->breakpointsByGroup[$group])) {
    if ($cache = $this->cacheBackend->get($this->cacheKey . ':' . $group)) {
      $this->breakpointsByGroup[$group] = $cache->data;
    }
    else {
      $breakpoints = array();
      foreach ($this->getDefinitions() as $plugin_id => $plugin_definition) {
        if ($plugin_definition['group'] == $group) {
          $breakpoints[$plugin_id] = $plugin_definition;
        }
      }
      uasort($breakpoints, array('Drupal\Component\Utility\SortArray', 'sortByWeightElement'));
      $this->cacheBackend->set($this->cacheKey . ':' . $group, $breakpoints, Cache::PERMANENT, array('breakpoints'));
      $this->breakpointsByGroup[$group] = $breakpoints;
    }
  }

  $instances = array();
  foreach ($this->breakpointsByGroup[$group] as $plugin_id => $definition) {
    if (!isset($this->instances[$plugin_id])) {
      $this->instances[$plugin_id] = $this->createInstance($plugin_id);
    }
    $instances[$plugin_id] = $this->instances[$plugin_id];
  }
  return $instances;
}