public HFileContextAttributesBuilderConsumer setReadType(final ReadType readType) {
    // TODO: this is not a part of the HFileBlock, its context of the operation. Should track this
    // detail elsewhere.
    this.readType = readType;
    return this;
  }
Specify the {@link ReadType} involced in this IO operation.
hbase-common/src/main/java/org/apache/hadoop/hbase/io/hfile/trace/HFileContextAttributesBuilderConsumer.java