code: public Object getProperty(String property) {
          try {
              return super.getProperty(property);
          } catch (MissingPropertyException e) {
              Object r = context.getVariableWithDefaultValue(property,MISSING);
              if (r==MISSING) throw e;
              return r;
          }
      }
docs: Allows values from {@link JellyContext} to be read
  like global variables. These includes 'request', 'response', etc.
  
  @see JellyClassTearOff