hashtagFilterExpression property
Hashtag filter expression is an s-expression used to provide feeds filtered by hashtags with specified criteria. Queries are specified with boolean predicates on what hashtags are there on the video. For instance, (and sport food) (or sport food) (and sport (or food comedy)) sport are all valid expressions. Non-UTF-8 characters are not allowed. If using boolean predicates, the expression needs to be wrapped with parenthesis. Required when the source is set as hashtagPlaylist.
Implementation
final String? hashtagFilterExpression;