code: public static MultiColumnRelation createInRelation(List<ColumnIdentifier.Raw> entities, List<? extends Term.MultiColumnRaw> inValues)
      {
          return new MultiColumnRelation(entities, Operator.IN, null, inValues, null);
      }
docs: Creates a multi-column IN relation with a list of IN values or markers.
  For example: "SELECT ... WHERE (a, b) IN ((0, 1), (2, 3))"
  @param entities the columns on the LHS of the relation
  @param inValues a list of Tuples.Literal instances or a Tuples.Raw markers