Defines the implementation of the composite
            component.  There must be zero or one of these in a
            composite component markup file.  If a
            <cc:interface> element appears,
            there must be a corresponding
            <composite-implementation> element. If no
            <cc:interface> element appears,
            the <composite-implementation> element is
            optional.  
| Name | Required | Type | Description | No Attributes Defined. | 
|---|