def kwargs_warn_until(kwargs,
                      version,
                      category=DeprecationWarning,
                      stacklevel=None,
                      _version_info_=None,
                      _dont_call_warnings=False):
    '''
    Helper function to raise a warning (by default, a ``DeprecationWarning``)
    when unhandled keyword arguments are passed to function, until the
    provided ``version_info``, after which, a ``RuntimeError`` will be raised
    to remind the developers to remove the ``**kwargs`` because the target
    version has been reached.
    This function is used to help deprecate unused legacy ``**kwargs`` that
    were added to function parameters lists to preserve backwards compatibility
    when removing a parameter. See
    :ref:`the deprecation development docs <deprecations>`
    for the modern strategy for deprecating a function parameter.

    :param kwargs: The caller's ``**kwargs`` argument value (a ``dict``).
    :param version: The version info or name after which the warning becomes a
                    ``RuntimeError``. For example ``(0, 17)`` or ``Hydrogen``
                    or an instance of :class:`salt.version.SaltStackVersion`.
    :param category: The warning class to be thrown, by default
                     ``DeprecationWarning``
    :param stacklevel: There should be no need to set the value of
                       ``stacklevel``. Salt should be able to do the right thing.
    :param _version_info_: In order to reuse this function for other SaltStack
                           projects, they need to be able to provide the
                           version info to compare to.
    :param _dont_call_warnings: This parameter is used just to get the
                                functionality until the actual error is to be
                                issued. When we're only after the salt version
                                checks to raise a ``RuntimeError``.
    '''
    if not isinstance(version, (tuple,
                                six.string_types,
                                salt.version.SaltStackVersion)):
        raise RuntimeError(
            'The \'version\' argument should be passed as a tuple, string or '
            'an instance of \'salt.version.SaltStackVersion\'.'
        )
    elif isinstance(version, tuple):
        version = salt.version.SaltStackVersion(*version)
    elif isinstance(version, six.string_types):
        version = salt.version.SaltStackVersion.from_name(version)

    if stacklevel is None:
        # Attribute the warning to the calling function,
        # not to kwargs_warn_until() or warn_until()
        stacklevel = 3

    if _version_info_ is None:
        _version_info_ = salt.version.__version_info__

    _version_ = salt.version.SaltStackVersion(*_version_info_)

    if kwargs or _version_.info >= version.info:
        arg_names = ', '.join('\'{0}\''.format(key) for key in kwargs)
        warn_until(
            version,
            message='The following parameter(s) have been deprecated and '
                    'will be removed in \'{0}\': {1}.'.format(version.string,
                                                              arg_names),
            category=category,
            stacklevel=stacklevel,
            _version_info_=_version_.info,
            _dont_call_warnings=_dont_call_warnings
        )