import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
<BUG>import javax.persistence.Entity;
import javax.persistence.ManyToMany;</BUG>
import javax.persistence.Table;
import javax.xml.bind.annotation.XmlElement;
import org.springframework.beans.support.MutableSortDefinition;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.persistence.Entity;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.Table;
import javax.xml.bind.annotation.XmlElement;
import org.springframework.beans.support.MutableSortDefinition;
