| Interface | Description | 
|---|---|
| ParamHolder | This interface represents a (request) parameter holder which extends  ValueHolderwithParamHolder.getName()method to obtain the parameter name associated with the parameter value and changes theParamHolder.getLocalValue()method to return the original, unconverted value and changes theParamHolder.getValue()method to return the converted
 value. | 
| Class | Description | 
|---|---|
| EditableValueHolderStateHelper | Helper class to save and restore state of an  EditableValueHolder. | 
| SimpleParam | This class provides a basic and default implementation of the  ParamHolderinterface. | 
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