public Builder operationTimeMs(long operationTimeMs) {
      this.operationTimeMs = operationTimeMs;
      return this;
    }
Sets the operationTime in ms of the {@link MessageInfo} to build.
@param operationTimeMs the operationTime to set.
@return This builder.
ambry-api/src/main/java/com/github/ambry/store/MessageInfo.java