/guava/guava/src/com/google/common/cache/LocalCache.java
if ( map.isExpired( entry, now) ) {   tryExpireEntries( now) ;   return null; }
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return null; } V value = entry.getValueReference().get(); if (value == null) { return null; } <extra_id_0> return null; } return value; } boolean isExpired(ReferenceEntry<K, V> entry, long now) { checkNotNull(entry);