return INT2FIX(treegetmutecountTRA(ta));
return INT2FIX(treemutecountTRA(ta));
static VALUE rbtra_mutationcount(VALUE self){  struct TreeAdaptor *ta;  int n;  Data_Get_Struct(self, struct TreeAdaptor, ta);  treemutateTRA(ta);  return INT2FIX(treegetmutecountTRA(ta));}