presto-base-jdbc/src/main/java/io/prestosql/plugin/jdbc/ColumnMapping.java/ColumnMapping/longMapping
class ColumnMapping:    public static ColumnMapping longMapping(Type prestoType, LongReadFunction readFunction, LongWriteFunction writeFunction)
    {
        return longMapping(prestoType, readFunction, writeFunction, UnaryOperator.identity());
    }