@JsonProperty(JSON_VERSION_SCHEMA_KEY)
  public DatasetBuilder setVersionSchema(Dataset.VersionSchema versionSchema) {
    this.versionSchema = versionSchema;
    return this;
  }
Set the version schema of the {@link Dataset} to build.
@param versionSchema the version schema to set.
@return the builder.
ambry-api/src/main/java/com/github/ambry/account/DatasetBuilder.java