/guava/android/guava/src/com/google/common/base/Equivalence.java
if ( this == obj) {
if ( t == null ) {
} return doEquivalent(a, b); } @ForOverride protected abstract boolean doEquivalent(T a, T b); public final int hash(@CheckForNull T t) { <extra_id_0> return 0; } return doHash(t); } @ForOverride protected abstract int doHash(T t);