"""
This program and the accompanying materials are made available under the terms of the
Eclipse Public License v2.0 which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-v20.html
SPDX-License-Identifier: EPL-2.0

Copyright Contributors to the Zincware Project.

Description:
"""


class NoneType:
    """Custom NoneType that is != None

    Examples
    --------
    you can check for NoneType or None
    >>> x = NoneType
    >>> x is NoneType
    >>> x is not None
    """

    def __init__(self):
        raise NotImplementedError()
