RuleUsage Properties | 
The RuleUsage type exposes the following members.
| Name | Description | |
|---|---|---|
| EndOffset | 
            Offset of the end of the rule body from the beginning of the stylesheet.
              | |
| StartOffset | 
            Offset of the start of the rule (including selector) from the beginning of the stylesheet.
              | |
| StyleSheetId | 
            The css style sheet identifier (absent for user agent stylesheet and user-specified
            stylesheet rules) this rule came from.
              | |
| Used | 
            Indicates whether the rule was actually used by some element in the page.
              |