presto-verifier/src/main/java/io/prestosql/verifier/VerifierConfig.java/VerifierConfig/setTestQueryTypes
class VerifierConfig:    @ConfigDescription("The types of control queries allowed to run [CREATE, READ, MODIFY]")
    @Config("test.query-types")
    public VerifierConfig setTestQueryTypes(String types)
    {
        if (Strings.isNullOrEmpty(types)) {
            this.testQueryTypes = ImmutableSet.of();
            return this;
        }

        ImmutableSet.Builder<QueryType> builder = ImmutableSet.builder();
        for (String value : Splitter.on(',').trimResults().omitEmptyStrings().split(types)) {
            builder.add(QueryType.valueOf(value.toUpperCase()));
        }

        this.testQueryTypes = builder.build();
        return this;
    }