presto-base-jdbc/src/main/java/io/prestosql/plugin/jdbc/BaseJdbcConfig.java/BaseJdbcConfig/setJdbcTypesMappedToVarchar
class BaseJdbcConfig:    @Config("jdbc-types-mapped-to-varchar")
    public BaseJdbcConfig setJdbcTypesMappedToVarchar(String jdbcTypesMappedToVarchar)
    {
        this.jdbcTypesMappedToVarchar = ImmutableSet.copyOf(Splitter.on(",").omitEmptyStrings().trimResults().split(nullToEmpty(jdbcTypesMappedToVarchar)));
        return this;
    }