Returns
From nsIMicrosummaryService
Get the set of microsummaries available for a given page. The set
might change after this method returns, since this method will trigger
an asynchronous load of the page in question (if it isn't already loaded)
to see if it references any page-specific microsummaries.
If the caller passes a bookmark ID, and one of the microsummaries
is the current one for the bookmark, this method will retrieve content
from the datastore for that microsummary, which is useful when callers
want to display a list of microsummaries for a page that isn't loaded,
and they want to display the actual content of the selected microsummary
immediately (rather than after the content is asynchronously loaded).
@param pageURI
the URI of the page for which to retrieve available microsummaries
@param bookmarkID (optional)
the ID of the bookmark for which this method is being called
@returns an nsIMicrosummarySet of nsIMicrosummaries for the given page
