returns the set of volunteers in this model . concode_field_sep HashSet<String> volunteers concode_elem_sep HashSet<String> coordinates concode_elem_sep HashSet<String> movers concode_elem_sep HashMap<String,String> location2coordinate concode_elem_sep HashSet<String> requesters concode_elem_sep HashMap<String,String> volunteer2location concode_elem_sep HashMap<String,String> requester2location concode_field_sep HashSet<String> getMovers concode_elem_sep void addLocation2Coordinate concode_elem_sep void addVolunteer concode_elem_sep double[] getVolunteerPosition concode_elem_sep HashSet<String> getCoordinates concode_elem_sep void addVolunteer2Location concode_elem_sep void addCoordinate concode_elem_sep HashMap<String,String> getRequester2Location concode_elem_sep HashMap<String,String> getLocation2Coordinate concode_elem_sep void addMover concode_elem_sep HashMap<String,String> getVolunteer2Location concode_elem_sep HashSet<String> getRequesters concode_elem_sep void addRequester2Location concode_elem_sep void addRequester
HashSet < String > function ( ) { return volunteers ; }