## 4.8 The class `PEL_FSetEventLists`

`getLowerBound` [member function]

  > `PEL_EventList &getLowerBound(void);`

  Returns the event list for lower bound events.

`getUpperBound` [member function]

  > `PEL_EventList &getUpperBound(void);`

  Returns the event list for upper bound events.

`getSingleValue` [member function]

  > `PEL_EventList &getSingleValue(void);`

  Returns the event list for single value events.

`gc` [member function]

  > `void gc(void);`

  Performs a garbage collection. Has to be called if the hosting propagation is garbage collected.