| CacheableValueExpression | Indicate the current ValueExpression can be assumed to be cacheable when it is
 being tracked by DefaultVariableMapper. | 
| ContextAware | Identification inferface for types that know about  Location
 and XML attribute name/value pair. | 
| ContextAwareExceptionWrapper | A exception wrapper that "knows" interesting info about place where problem occured. | 
| ELText | Handles parsing EL Strings in accordance with the EL-API Specification. | 
| LocationMethodExpression | A MethodExpression that contains the original MethodExpression and
 the Location of the facelet file from which the MethodExpression was
 created. | 
| LocationValueExpression | A ValueExpression that contains the original ValueExpression and
 the Location of the facelet file from which the ValueExpression was
 created. | 
| VariableMapperBase | Defines an interface to detect when an EL expression has been
 resolved by a facelets variable mapper and in that way allow cache it
 if it is possible. |