+ /**
+ * @return The index (zero-based) on this sequence in the MSA.
+ * It returns {@code -1} if this information is not available.
+ */
+ public int getIndex() { return index; }
+
+ /**
+ * Defines the position of this sequence in the MSA.
+ * Use the value {@code -1} if this information is undefined.
+ *
+ * @param The position for this sequence. This value is zero-based (zero for this first sequence)
+ */
+ public void setIndex(int value) { index = value; }