code: public String getProperty(String key)
      {
          if (properties == null)
              return null;
          String value = properties.get(key);
          if (value == null)
          {
              if (key.startsWith(PROPERTY_PREFIX))
                  value = properties.get(key.substring(PROPERTY_PREFIX.length()));
              else
                  value = properties.get(PROPERTY_PREFIX + key);
          }
          return value;
      }
docs: Get this property.
  @param key
  @return