code: private SimpleHashSetEntry<T>[] makeTable(int newCapacity) {
          @SuppressWarnings("unchecked")
          SimpleHashSetEntry<T>[] newTable = (SimpleHashSetEntry<T>[]) new SimpleHashSetEntry[newCapacity];
          mTable = newTable;
          threshold = (newCapacity >> 1) + (newCapacity >> 2); // 3/4 capacity
          return newTable;
      }
docs: Allocate a table of the given capacity and set the threshold accordingly.
  
  @param newCapacity must be a power of two