guava/src/com/google/common/collect/Platform.java
static <K, V> Map<K, V> newHashMapWithExpectedSize(int expectedSize) {
    return Maps.newHashMapWithExpectedSize(expectedSize);
  }
static <K, V> Map<K, V> newHashMapWithExpectedSize(int expectedSize) {
    return Maps.newHashMapWithExpectedSize(expectedSize);
  }
Returns the platform preferred implementation of a map based on a hash table.