public Object get(Expression expression) {
    Objects.requireNonNull(expression, "expression");
    Preconditions.checkArgument(valuesAsMap.containsKey(expression), "expression %s not present in tuple", expression);
    return valuesAsMap.get(expression);
  }
Result of a projection as returned by the backend
criteria/common/src/org/immutables/criteria/backend/ProjectedTuple.java