code: public void readToExistingBean(EndianAwareDataInputStream is, ThirdPartyParseable target) 
  			throws IllegalAccessException, UnrecognizedFormatException{
  		//target = (CLASS)Beans.instantiate(null, clazz.getName());
  		ensureContextInstantiatedForReading(is,target);
  		target.describeFormat(this);
  		popBean();
  		}
docs: Read the specified EndianAwareDataInputStream, parsing it and writing the property values to the given instantiated bean.<br>
  When finished, the current position of the stream will be immediately after the data extracted.
  @param is						An endian-aware InputStream supplying the raw data to be parsed.
  @param target					The bean to which the properties are to be updated. Parser is implicitly specified when passing this bean.
  @throws IllegalAccessException
  @throws UnrecognizedFormatException
  @since Sep 17, 2012