code: public final static PolymerNotation addMonomerNotation(int position, PolymerNotation polymer,
  			MonomerNotation monomerNotation) {
  		polymer.getPolymerElements().getListOfElements().add(position, monomerNotation);
  		return polymer;
  	}
docs: method to add a new MonomerNotation to a PolymerNotation
  
  @param position
  position of the new MonomerNotation
  @param polymer
  PolymerNotation
  @param monomerNotation
  new MonomerNotation
  @return PolymerNotation with the new MonomerNotation