code: public int getSize() {
  		int dataSize = size;
  
  		for (int i = 0; i < getChildCount(); i++) {
  			dataSize += ((ObjectGraphNode) getChildAt(i)).getSize();
  		}
  
  		return dataSize;
  	}
docs: Returns the sum of the size of primitive/simple value data contained within this node. This will differ from the
  serialized size, as references to shared objects aren't followed/counted.
  
  @return the actual data size, in bytes.