def self.studio_classes
@studio_classes ||= ['action cell', 'alert reply', 'application', 'box',
'browser( cell)?', 'bundle', 'button( cell)?', 'cell',
'clip view', 'color well', 'color-panel',
'combo box( item)?', 'control',
'data( (cell|column|item|row|source))?', 'default entry',
'dialog reply', 'document', 'drag info', 'drawer',
'event', 'font(-panel)?', 'formatter',
'image( (cell|view))?', 'matrix', 'menu( item)?', 'item',
'movie( view)?', 'open-panel', 'outline view', 'panel',
'pasteboard', 'plugin', 'popup button',
'progress indicator', 'responder', 'save-panel',
'scroll view', 'secure text field( cell)?', 'slider',
'sound', 'split view', 'stepper', 'tab view( item)?',
'table( (column|header cell|header view|view))',
'text( (field( cell)?|view))?', 'toolbar( item)?',
'user-defaults', 'view', 'window']
end