Javadoc
Returns a Map of Lists. The key of the map is a Long, project id and the value of the map is a list of group
names that the user is a member of for the project. This method is meant to provide an efficient means to
discover which groups that are associated with a project role implicitly include the specified user in that project
role. We allow you to specify a range of projectsToLimitBy so that you can perform only one query to find this
information for many projects for a single projectRole.