<commit_before>package tree;

import java.util.Collection;
import java.util.Iterator;

/**
 * @author <NAME>
 */
public class BinarySearchTree<T> implements Collection<T> {
    @Override
    public int size() {
        return 0;
    }

    @Override
    public boolean isEmpty() {
        return false;
    }

    @Override
    public boolean contains(Object o) {
        return false;
    }

    @Override
    public Iterator<T> iterator() {
        return null;
    }

    @Override
    public Object[] toArray() {
        return new Object[0];
    }

    @Override
    public <T1> T1[] toArray(T1[] a) {
        return null;
    }

    @Override
    public boolean add(T t) {
        return false;
    }

    @Override
    public boolean remove(Object o) {
        return false;
    }

    @Override
    public boolean containsAll(Collection<?> c) {
        return false;
    }

    @Override
    public boolean addAll(Collection<? extends T> c) {
        return false;
    }

    @Override
    public boolean removeAll(Collection<?> c) {
        return false;
    }

    @Override
    public boolean retainAll(Collection<?> c) {
        return false;
    }

    @Override
    public void clear() {

    }
}<commit_msg>implements Collection<commit_after>package tree;

import java.util.Collection;
import java.util.Iterator;

/**
 * @author <NAME>
 */
public class BinarySearchTree<T> implements Collection<Comparable<T>> {
    protected Comparable<T> _key;
    protected BinarySearchTree<T> _parent;
    protected BinarySearchTree<T> _left;
    protected BinarySearchTree<T> _right;

    @Override
    public int size() {
        return 0;
    }

    @Override
    public boolean isEmpty() {
        return false;
    }

    @Override
    public boolean contains(Object o) {
        return false;
    }

    @Override
    public Iterator<Comparable<T>> iterator() {
        return null;
    }

    @Override
    public Object[] toArray() {
        return new Object[0];
    }

    @Override
    public <T> T[] toArray(T[] a) {
        return null;
    }

    @Override
    public boolean add(Comparable<T> tComparable) {
        return false;
    }

    @Override
    public boolean remove(Object o) {
        return false;
    }

    @Override
    public boolean containsAll(Collection<?> c) {
        return false;
    }

    @Override
    public boolean addAll(Collection<? extends Comparable<T>> c) {
        return false;
    }

    @Override
    public boolean removeAll(Collection<?> c) {
        return false;
    }

    @Override
    public boolean retainAll(Collection<?> c) {
        return false;
    }

    @Override
    public void clear() {

    }
}
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