| Class | Description | 
|---|---|
| Selector | A Selector object holds a CSS selector. | 
| Style | A Style object defines a set of visual (or aural) style properties. | 
| Styles | Styles is a class that contains information about CSS Selectors and their
 corresponding Style object (i.e., the css properties) for the css selectors  
 that are written to the generated css file. | 
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