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    Return the ``attrs`` attribute values of *inst* as a dict.

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    :param callable filter: A callable whose return code determines whether an
        attribute or element is included (``True``) or dropped (``False``).  Is
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    :param callable dict_factory: A callable to produce dictionaries from.  For
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    :param bool retain_collection_types: Do not convert to ``list`` when
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    :raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs``
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    :param callable filter: A callable whose return code determines whether an
        attribute or element is included (``True``) or dropped (``False``).  Is
        called with the `attr.Attribute` as the first argument and the
        value as the second argument.
    :param callable tuple_factory: A callable to produce tuples from.  For
        example, to produce lists instead of tuples.
    :param bool retain_collection_types: Do not convert to ``list``
        or ``dict`` when encountering an attribute which type is
        ``tuple``, ``dict`` or ``set``.  Only meaningful if ``recurse`` is
        ``True``.

    :rtype: return type of *tuple_factory*

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    Check whether *cls* is a class with ``attrs`` attributes.

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    Copy *inst* and apply *changes*.

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        be found on *cls*.
    :raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs``
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    Create a new instance, based on *inst* with *changes* applied.

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    :raise TypeError: If *attr_name* couldn't be found in the class
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    With no arguments, names will be looked up in the module in which the class
    was created. If this is not what you want, e.g. if the name only exists
    inside a method, you may pass *globalns* or *localns* to specify other
    dictionaries in which to look up these names. See the docs of
    `typing.get_type_hints` for more details.

    :param type cls: Class to resolve.
    :param Optional[dict] globalns: Dictionary containing global variables.
    :param Optional[dict] localns: Dictionary containing local variables.
    :param Optional[list] attribs: List of attribs for the given class.
        This is necessary when calling from inside a ``field_transformer``
        since *cls* is not an ``attrs`` class yet.

    :raise TypeError: If *cls* is not a class.
    :raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs``
        class and you didn't pass any attribs.
    :raise NameError: If types cannot be resolved because of missing variables.

    :returns: *cls* so you can use this function also as a class decorator.
        Please note that you have to apply it **after** `attr.s`. That means
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    ..  versionadded:: 20.1.0
    ..  versionadded:: 21.1.0 *attribs*

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