presto-orc/src/main/java/io/prestosql/orc/DiskRange.java/DiskRange/equals
class DiskRange:    @Override
    public boolean equals(Object obj)
    {
        if (this == obj) {
            return true;
        }
        if (obj == null || getClass() != obj.getClass()) {
            return false;
        }
        DiskRange other = (DiskRange) obj;
        return Objects.equals(this.offset, other.offset)
                && Objects.equals(this.length, other.length);
    }