| Class | Description | 
|---|---|
| CustomResourceLoader | 
 This class is responsible for loading messages resources from file system 
 | 
| ErrorMessageConstants | 
 This class contains all constants that describes names of properties, which are used as keys,
 when showing localized error messages on pages of install and databtase wizard 
 | 
| FilterUtil | 
 This class contains convenient methods for storing/retrieving locale parameters into/from DB as
 admin's user property and as default locale property for OpenMRS system 
 | 
| LocalizationTool | 
 This class is intended for accessing  
ResourceBundle and formatting messages therein. | 
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