+ vector<string> getNamesSeqs();
+ vector<string> getNamesSeqs(vector<string>); //get names of seqs belonging to a group or set of groups
+ int getCopy(TreeMap&);
+
+ vector<string> namesOfSeqs;
+ map<string,int> seqsPerGroup; //groupname, number of seqs in that group.
+ map<string, GroupIndex> treemap; //sequence name and <groupname, vector index>
+
+