values.addAll(encode(comparison.getOperand2().currentValue()));
} else {
return null;
}
} else if (constraint instanceof InImpl) {
InImpl in = (InImpl) constraint;
if (isIndexed(in.getOperand1())) {
for (StaticOperandImpl operand : in.getOperand2()) {
values.addAll(encode(operand.currentValue()));
}
} else {
return null;
}