public boolean guaranteesOldValue() {
    return (opDetails & OP_DETAILS_GUARANTEES_OLD_VALUE) != 0;
  }
Returns true if this operation is a ConcurrentMap operation that guarantees the old value to be
returned no matter what expense may be incurred in doing so.

@return true if this operation has this guarantee
@since GemFire 6.5
geode-core/src/main/java/org/apache/geode/cache/Operation.java