def __init__(self):
        """Initialize the class instance."""
        self.name = None  # type: Optional[YangIdentifier]
        """Name of the receiver."""
        self.ns = None  # type: Optional[YangIdentifier]
        """Namespace of the receiver."""
        self.parent = None  # type: Optional["InternalNode"]
        """Parent schema node."""
        self.description = None  # type: Optional[str]
        """Description of the receiver."""
        self.must = []  # type: List[Must]
        """List of "must" expressions attached to the receiver."""
        self.when = None  # type: Optional["Expr"]
        """Optional "when" expression that makes the receiver conditional."""
        self.val_count = 0
        self._ctype = None
        """Content type of the receiver."""
def __init__ ( self ) : self . name = None self . ns = None self . parent = None self . description = None self . must = [ ] self . when = None self . val_count = 0 self . _ctype = None
Initialize the class instance.