+ /**
+ * Get the half-ring index
+ *
+ * @param det Detector
+ * @param ring Ring
+ * @param board Board number
+ * @param monitor Monitor
+ *
+ * @return Half ring index
+ */
+ Int_t GetHalfringIndex(UShort_t det, Char_t ring,
+ UShort_t board, UShort_t monitor = 0) const;