def __init__(self, msg: str, *children: "DeformErrorInterface") -> None:
        """
        Args:
            msg: error message
            children: further, child errors (e.g. from subfields with problems)
        """
        self._msg = msg
        self.children = children
def __init__ ( self , msg : str , * children : "DeformErrorInterface" ) -> None : self . _msg = msg self . children = children
Args:
            msg: error message
            children: further, child errors (e.g. from subfields with problems)