Call specific Plugin

In Drupal we use the Plugin API to create plugin type functionality. If you want to call specific plugin of type then you can simple use the below snippet 

 $plugin_manager = \Drupal::service('plugin.manager.my_plugin_type');
 $plugin = $plugin_manager->createInstance('my_plugin_type_id');

You call the plugin manager service for your plugin type and then  you can pass the your plugin type id to call the specific plugin.