def METHOD_NAME(cls, parameter='members'):
    """
    Get the :code:`dict` value of the parameter collected by the :code:`@declarative` class decorator.
    This is the same value that would be submitted to the :code:`__init__` invocation in the :code:`members`
    argument (or another name if overridden by the :code:`parameter` specification)
    :type cls: class
    :type parameter: str
    :rtype: dict
    """
    return getattr(cls, '_declarative_' + parameter, {})