Message Generation does not generate header repeating groups correctly

After Message Generation, we can't find the class "public static class NoHops extends Group"; at QFJ, and so, we can use this header repeating group like other repeating group.
Maybe, we can generate some codes like this, at quickfix.fix44.message.java or quickfix.fix44.message.Header :

public static class NoHops extends Group {
public NoHops() {
super(627,628,
new int[]

{628,629,630,0 }

); }
public void set(quickfix.field.HopCompID value)

{ setField(value); }
public quickfix.field.HopCompID get(quickfix.field.HopCompID value) throws FieldNotFound
{ getField(value); return value; }
public quickfix.field.HopCompID getHopCompID() throws FieldNotFound
{ quickfix.field.HopCompID value = new quickfix.field.HopCompID(); getField(value); return value; }
public boolean isSet(quickfix.field.HopCompID field)
{ return isSetField(field); }
public boolean isSetHopCompID()
{ return isSetField(628); }
public void set(quickfix.field.HopSendingTime value)
{ setField(value); }

public quickfix.field.HopSendingTime get(quickfix.field.HopSendingTime value)
throws FieldNotFound

{ getField(value); return value; }
public quickfix.field.HopSendingTime getHopSendingTime() throws FieldNotFound
{ quickfix.field.HopSendingTime value = new quickfix.field.HopSendingTime(); getField(value); return value; }
public boolean isSet(quickfix.field.HopSendingTime field)
{ return isSetField(field); }
public boolean isSetHopSendingTime()
{ return isSetField(629); }
public void set(quickfix.field.HopRefID value)
{ setField(value); }
public quickfix.field.HopRefID get(quickfix.field.HopRefID value)
throws FieldNotFound
{ getField(value); return value; }

public quickfix.field.HopRefID getHopRefID() throws FieldNotFound

{ quickfix.field.HopRefID value = new quickfix.field.HopRefID(); getField(value); return value; }

public boolean isSet(quickfix.field.HopRefID field)

{ return isSetField(field); }

public boolean isSetHopRefID()

{ return isSetField(630); }

}