presto-parser/src/main/java/io/prestosql/sql/parser/AstBuilder.java/AstBuilder/visitQuotedIdentifier
class AstBuilder:    @Override
    public Node visitQuotedIdentifier(SqlBaseParser.QuotedIdentifierContext context)
    {
        String token = context.getText();
        String identifier = token.substring(1, token.length() - 1)
                .replace("\"\"", "\"");

        return new Identifier(getLocation(context), identifier, true);
    }