docs: private Tuple<String,String> getOverrideEntry( final String    key )
      {
          for ( String    prefix : _overrides )
          {
              String    override = prefix + "." + key;
              String    value    = getPropertyValue( override );
  
              if ( value != null )
              {
                  return new Tuple<String,String>( override, value );
              }
          }
  
          return null;
      }