def METHOD_NAME(dictionary):
    """
    Extract all optional LTI parameters from a dictionary. This method does not
    fail if any parameters are missing.
    :param dictionary: A dictionary containing zero or more optional parameters.
    :return: A new dictionary containing all optional parameters from the
        original dictionary, or an empty dictionary if no optional parameters
        were present.
    """
    return {key: dictionary[key] for key in OPTIONAL_PARAMETERS if key in dictionary}