public int getOffset() {
    return 0;
  }
Possible offset associated with schema. This is useful when the schema is stored inline along
with the data.

<p>
Defaulted to zero. Consumers can choose to override this value to provide a custom offset.
</p>
serde/src/java/org/apache/hadoop/hive/serde2/avro/AvroSchemaRetriever.java