private OperatorNode<ExpressionOperator> readConjOp(ExpressionOperator op, List<Equality_expressionContext> nodes, Scope scope) {
        List<OperatorNode<ExpressionOperator>> arguments = new ArrayList<>(nodes.size());
        for (ParseTree child : nodes) {
            arguments.add(convertExpr(child, scope));
        }
        return OperatorNode.create(op, arguments);
    }
Translate the ANTLR grammar into the logical representation.
container-search/src/main/java/com/yahoo/search/yql/ProgramParser.java