code: protected Set<String> getModifications(Match m, String label)
  	{
  		PhysicalEntity pe = (PhysicalEntity) m.get(label, getPattern());
  		return toStringSet(new HashSet<ModificationFeature>(FEAT_ACC.getValueFromBean(pe)));
  	}
docs: Gets modifications of the given element in a string. The element has to be a PhysicalEntity.
  @param m match
  @param label label of the PhysicalEntity
  @return modifications