Source Reference:

• Component: bbPress :: bbp-admin

  File: /bbp-admin/bbp-admin.php :: Trac Source Line: 326

  		// Leave if we're not in the import section
  		if ( !defined( 'WP_LOAD_IMPORTERS' ) )
  			return;
  
  		// Load Importer API
  		require_once( ABSPATH . 'wp-admin/includes/import.php' );
  
  		// Load our importers
  		$importers = apply_filters( 'bbp_importers', array( 'bbpress' ) );
  
  		// Loop through included importers
  		foreach ( $importers as $importer ) {
  
  			// Allow custom importer directory
  			$import_dir  = apply_filters( 'bbp_importer_path', $this->admin_dir . 'importers', $importer );
  
  			// Compile the importer path
  			$import_file = trailingslashit( $import_dir ) . $importer . '.php';