code: public static void setStructuralFeature(EObject object, EStructuralFeature property, Object value) {
  		assert object != null;
  		assert property != null;
  		if (value == null) {
  			object.eUnset(property);
  		} else {
  			object.eSet(property, value);
  		}
  	}
docs: Set the given structure feature with the given value.
  
  @param object the object that contains the feature.
  @param property the feature to change.
  @param value the value of the feature.