(array|string)$args Optional. An array of key => value arguments to match against the post type objects. Default empty array.
(string)$output Optional. The type of output to return. Accepts post type 'names' or 'objects'. Default 'names'.
(string)$operator Optional. The logical operation to perform. 'or' means only one element from the array needs to match; 'and' means all elements must match; 'not' means no elements may match. Default 'and'.