import org.apache.giraph.conf.MessageClasses;
import org.apache.giraph.utils.EmptyIterable;
import org.apache.giraph.utils.VertexIdMessageIterator;
import org.apache.giraph.utils.VertexIdMessages;
import org.apache.hadoop.io.Writable;
<BUG>import org.apache.hadoop.io.WritableComparable;
import com.google.common.collect.Maps;</BUG>
public class DiskBackedMessageStore<I extends WritableComparable,
V extends Writable, E extends Writable, M extends Writable> implements
MessageStore<I, M> {

import org.apache.giraph.conf.MessageClasses;
import org.apache.giraph.utils.EmptyIterable;
import org.apache.giraph.utils.VertexIdMessageIterator;
import org.apache.giraph.utils.VertexIdMessages;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableComparable;
import com.google.common.collect.Iterables;
import com.google.common.collect.Maps;
public class DiskBackedMessageStore<I extends WritableComparable,
V extends Writable, E extends Writable, M extends Writable> implements
MessageStore<I, M> {
