code: public double getDouble(String name) throws JSONException {
  		Object object = get(name);
  		Double result = JSON.toDouble(object);
  		if (result == null) {
  			throw JSON.typeMismatch(name, object, "double");
  		}
  		return result;
  	}
docs: Returns the value mapped by {@code name} if it exists and is a double or can be
  coerced to a double.
  
  @param name the name of the property
  @return the value
  @throws JSONException if the mapping doesn't exist or cannot be coerced to a
  double.