code: private Item newInteger(final int value) {
          Item result = get(key.set(INT, value));
          if (result == null) {
              pool.putByte(INT).putInt(value);
              result = new Item(poolIndex++, key);
              put(result);
          }
          return result;
      }
docs: Adds an integer to the constant pool of the class being build. Does nothing if the constant pool already contains
  a similar item.
  
  @param value the int value.
  @return a new or already existing int item.