@property<EOL><INDENT>def kind(self) -> str:<DEDENT>
return '<STR_LIT:O>'<EOL>
A character code (one of 'biufcmMOSUV'), default 'O'

This should match the NumPy dtype used when the array is
converted to an ndarray, which is probably 'O' for object if
the extension type cannot be represented as a built-in NumPy
type.

See Also
--------
numpy.dtype.kind