Filter on relationships with exact match. Multiple filter elements in one property, e.g. sourceExternalIds: [ "a", "b" ], will return all relationships where the sourceExternalId field is either a or b. Filters in multiple properties will return the relationships that match all criteria. If the filter is not specified it default to an empty filter.
If true, will try to fetch the resources referred to in the relationship, based on the users access rights. Will silently fail to attatch the resources if the user lacks access to some of them.