def is_interval_dtype(arr_or_dtype):
<EOL>if arr_or_dtype is None:<EOL><INDENT>return False<EOL><DEDENT>return IntervalDtype.is_dtype(arr_or_dtype)<EOL>
Check whether an array-like or dtype is of the Interval dtype.

Parameters
----------
arr_or_dtype : array-like
    The array-like or dtype to check.

Returns
-------
boolean
    Whether or not the array-like or dtype is of the Interval dtype.

Examples
--------
>>> is_interval_dtype(object)
False
>>> is_interval_dtype(IntervalDtype())
True
>>> is_interval_dtype([1, 2, 3])
False
>>>
>>> interval = pd.Interval(1, 2, closed="right")
>>> is_interval_dtype(interval)
False
>>> is_interval_dtype(pd.IntervalIndex([interval]))
True