code: Item newFloat(final float value) {
          key.set(value);
          Item result = get(key);
          if (result == null) {
              pool.putByte(FLOAT).putInt(key.intVal);
              result = new Item(index++, key);
              put(result);
          }
          return result;
      }
docs: Adds a float to the constant pool of the class being build. Does nothing
  if the constant pool already contains a similar item.
  
  @param value
  the float value.
  @return a new or already existing float item.