Expanded class hierarchy of views_plugin_argument_default in Views (for Drupal 7) 6.2
- class \views_object
- class \views_handler
- class \views_plugin
- class \views_plugin_access
- class \views_plugin_argument_default
- class \views_plugin_argument_validate
- class \views_plugin_cache
- class \views_plugin_display
- class \views_plugin_row
- class \views_plugin_style