protected void createRegion() {
    Compressor compressor = new SnappyCompressor();
    createCompressedRegionOnVm(getVM(TEST_VM), REGION_NAME, compressor);
  }
Populates the put all map and key collection.
geode-core/src/distributedTest/java/org/apache/geode/internal/compression/CompressionRegionOperationsDUnitTest.java