import java.util.stream.Collectors;
import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Objects.requireNonNull;
@Immutable
public class PipelineStats
<BUG>{
private final DateTime firstStartTime;</BUG>
private final DateTime lastStartTime;
private final DateTime lastEndTime;
private final boolean inputPipeline;

import java.util.stream.Collectors;
import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Objects.requireNonNull;
@Immutable
public class PipelineStats
{
private final int pipelineId;
private final DateTime firstStartTime;
private final DateTime lastStartTime;
private final DateTime lastEndTime;
private final boolean inputPipeline;
