nggLoader start_plugin method

Hello,

Im doing some research in the next gen gallery plugin and don’t understand the following in the nggLoader class:

In the ‘constructor’ the method ‘start_plugin()’ is called with:

// Start this plugin once all other plugins are fully loaded
add_action( 'plugins_loaded', array(&$this, 'start_plugin') );

Then in the start_plugin method, it says to or load the admin panel or the frontend functions.

// Load the admin panel or the frontend functions
if ( is_admin() ) {	

  // Pass the init check or show a message
  if (get_option( 'ngg_init_check' ) != false )
    add_action( 'admin_notices', create_function('', 'echo \'<div id="message" class="error"><p><strong>' . get_option( "ngg_init_check" ) . '</strong></p></div>\';') );

  } else {
      //..load front end functions

I can’t figure out were in this frase the admin panel is loaded..

Anybody some clear visions??

cheers!