/guava/guava/src/com/google/common/base/Equivalence.java
if ( target == null || b == null) {
if ( a == null || b == null ) {
public abstract class Equivalence<T> implements BiPredicate<@Nullable T, @Nullable T> { protected Equivalence() {} public final boolean equivalent(@CheckForNull T a, @CheckForNull T b) { if (a == b) { return true; } <extra_id_0> return false; } return doEquivalent(a, b); } @Deprecated @Override