public boolean removeTuple(Tuple t){
  Table table=t.getTable();
  if (m_sets.contains(table)) {
    return table.removeTuple(t);
  }
 else {
    return false;
  }
}

public boolean removeTuple ( Tuple t ) { Table table = t . getTable ( ) ; if ( m_sets . contains ( table ) ) { return table . removeTuple ( t ) ; } else { return false ; } }
removes the tuple from its source set if that source set is contained within this composite .
