private void acquireWriteLock(DiskRegion dr) {
    // @todo darrel: this is no longer a write lock need to change method name
    dr.acquireWriteLock();
  }
This function is having a default visiblity as it is used in the OplogJUnitTest for a bug
verification of Bug # 35012

All callers must have {@link #releaseWriteLock(DiskRegion)} in a matching finally block.

Note that this is no longer implemented by getting a write lock but instead locks the same lock
that acquireReadLock does.

@since GemFire 5.1
geode-core/src/main/java/org/apache/geode/internal/cache/DiskStoreImpl.java