text: import sys
  
  from napari_plugin_engine import PluginManager
  from . import hook_specifications
  from . import _builtins
  
  # the main plugin manager instance for the `napari` plugin namespace.
  plugin_manager = PluginManager(
      'napari', discover_entry_point='napari.plugin', discover_prefix='napari_'
  )
  with plugin_manager.discovery_blocked():
      plugin_manager.add_hookspecs(hook_specifications)
      plugin_manager.register(_builtins, name='builtins')
  
  
  __all__ = [
      "PluginManager",
      "plugin_manager",
  ]
  