package com.cloudera.oryx.app.rdf.tree;
import java.io.Serializable;
import java.util.Objects;
public abstract class TreeNode implements Serializable {
private final String id;
<BUG>protected TreeNode(String id) {
Objects.requireNonNull(id);</BUG>
this.id = id;
}
public String getID() {

package com.cloudera.oryx.app.rdf.tree;
import java.io.Serializable;
import java.util.Objects;
public abstract class TreeNode implements Serializable {
private final String id;
TreeNode(String id) {
Objects.requireNonNull(id);
this.id = id;
}
public String getID() {
