presto-parser/src/main/java/io/prestosql/sql/tree/DereferenceExpression.java/DereferenceExpression/from
class DereferenceExpression:    public static Expression from(QualifiedName name)
    {
        Expression result = null;

        for (String part : name.getParts()) {
            if (result == null) {
                result = new Identifier(part);
            }
            else {
                result = new DereferenceExpression(result, new Identifier(part));
            }
        }

        return result;
    }