code: public static IBond.Order increaseBondOrder(IBond.Order oldOrder) {
      	switch (oldOrder) {
          case SINGLE:
              return Order.DOUBLE;
          case DOUBLE:
              return Order.TRIPLE;
          case TRIPLE:
              return Order.QUADRUPLE;
          case QUADRUPLE:
              return Order.QUINTUPLE;
          case QUINTUPLE:
              return Order.SEXTUPLE;
          default:
              return oldOrder;
      	}
      }
docs: Returns the IBond.Order one higher. Does not increase the bond order
  beyond the QUADRUPLE bond order.
  @param oldOrder the old order
  @return The incremented bond order
  @see #increaseBondOrder(org.openscience.cdk.interfaces.IBond)
  @see #decreaseBondOrder(org.openscience.cdk.interfaces.IBond.Order)
  @see #decreaseBondOrder(org.openscience.cdk.interfaces.IBond)