# Source code for atom.containerlist

    # --------------------------------------------------------------------------------------
    # Copyright (c) 2013-2025, Nucleic Development Team.
    #
    # Distributed under the terms of the Modified BSD License.
    #
    # The full license is in the file LICENSE, distributed with this software.
    # --------------------------------------------------------------------------------------
    from .catom import Validate
    from .list import List

    class ContainerList(List):
        """A List member which supports container notifications."""

        __slots__ = ()

        def __init__(self, item=None, default=None):
            """Initialize a ContainerList."""
            super(ContainerList, self).__init__(item, default)
            self.set_validate_mode(Validate.ContainerList, self.item)