code: protected String getParameter(String key, String defaultValue) {
  
          String result = m_parameters.get(key);
          if (result == null) {
              result = defaultValue;
          }
          return result;
      }
docs: Gets the configuration parameter for a given key, and if it doesn't find one, returns a default value.<p>
  
  @param key the configuration key
  @param defaultValue the default value to use when the configuration entry isn't found
  
  @return the configuration value