The config for streaming-based notifications, which send each
event as soon as it is detected.
filter Expression that defines the filter to apply across
create/update events of assets or findings as specified by
the event type. The expression is a list of zero or more
restrictions combined via logical operators ``AND`` and
``OR``. Parentheses are supported, and ``OR`` has higher
precedence than ``AND``.
Restrictions have the form ``