@Override
    public String toString() {
      return "[id: " + id + " entryType: " + entryType + " size: " + size + "]";
    }
Create an instance with {@code id} and {@code entryType}
@param id the {@link MockId} of the entry.
@param entryType the type of the entry.
@param size the size of the log entry.
ambry-store/src/test/java/com/github/ambry/store/BlobStoreCompactorTest.java